Onion routing is an anonymous communication technique that encrypts and then bounces communications through multiple nodes, akin to peeling layers from an onion. It was developed in the late 1990s and patented by the US Navy. Tor is the predominant technology that uses onion routing today. It encrypts data in successive layers to hide the origin, destination, and contents of messages as they pass through intermediate nodes. This provides strong anonymity and unlinkability between senders and receivers.
Onion Routing (Tor) is an anonymity network that allows users to securely communicate on the internet without compromising their privacy. It works by routing traffic through several servers, making it impossible for observers to trace the connection back to the user. Tor is the most widely used implementation of the Onion Routing design and improves upon the original design by allowing any server along the circuit to act as an exit point, making it harder to determine where traffic originated. Individuals, organizations, and governments all use Tor to keep communications private.
Tor is an anonymizing tool that protects users' privacy and anonymity online. It works by bouncing communications around a distributed network of volunteer-run relays around the world, making it difficult to trace the origin or destination of a user's traffic. Originally developed by the U.S. Naval Research Laboratory to protect government communications, Tor is now used freely by people seeking to browse the web anonymously, as well as journalists, activists, and others seeking to circumvent censorship or avoid surveillance.
Tor is an anonymity network that allows users to browse the web anonymously. It works by routing traffic through a series of volunteer servers, or relays, that encrypt and then randomly route data in an attempt to make it untraceable. The Tor browser bundles this routing technology to allow users to access the open web as well as "hidden services" anonymously. While Tor provides anonymity, it has some weaknesses including potential traffic analysis of autonomous systems and exit node eavesdropping. The presentation provides an overview of how Tor works and relays, how to use Tor safely, and some common services found on Tor.
Onion routing and tor: Fundamentals and Anonymityanurag singh
Onion Routing and Tor: Fundamentals and anonymity discusses anonymity on the internet and how Tor works to provide anonymity. It explains that traditional IP addresses and browser tracking can be linked to a user's identity. Tor creates circuits through multiple relay nodes to hide a user's location and communications. Key features of Tor include using volunteer-run relay nodes, protecting against traffic analysis, and enabling hidden services to host anonymous websites. While Tor enhances anonymity, it cannot prevent all timing attacks if the start and end of a user's traffic can be observed.
This document provides an overview of anonymity systems like Tor and I2P. It describes how Tor works by passing data through a series of proxies to hide a user's location and usage. The Tor Project is a non-profit organization that maintains the Tor network software to provide anonymity online. The document outlines potential attacks against Tor like traffic analysis, compromised relays, and social engineering. It also lists current sponsors and tools that can be used to access or configure the Tor network.
Onion routing is a technique for anonymous communication over a computer network. In an onion network, messages are encapsulated in layers of encryption, analogous to layers of an onion. The encrypted data is transmitted through a series of network nodes called onion routers, each of which "peels" away a single layer, uncovering the data's next destination. When the final layer is decrypted, the message arrives at its destination. The sender remains anonymous because each intermediary knows only the location of the immediately preceding and following nodes.
Onion routing was developed in the mid-1990s at the U.S. Naval Research to protect U.S. intelligence communications online. It was further developed by the Defence Advanced Research Projects Agency (DARPA) and patented by the Navy in 1998. Onion Routing is implemented The Onion Routing project or TOR project.
Tor is an anonymous communication network that allows users to securely communicate on the internet without revealing their location or identity. It works by routing a user's communications through a series of relay servers run by volunteers all around the world, making it difficult to trace the origin or destination of the communications. Tor protects users' privacy and anonymity through its onion routing technique which encrypts and then randomly bounces communications through multiple nodes. While Tor provides anonymity, it can also be used for illegal activities which presents challenges for its widespread adoption and use.
Types of Computer Forensics Technology, Types of Military Computer Forensic Technology, Types of Law Enforcement, Computer Forensic Technology, Types of Business Computer Forensic Technology, Specialized Forensics Techniques, Hidden Data and How to Find It, Spyware and Adware, Encryption Methods and Vulnerabilities, Protecting Data from Being Compromised Internet Tracing Methods, Security and Wireless Technologies, Avoiding Pitfalls with Firewalls Biometric Security Systems
Onion Routing (Tor) is an anonymity network that allows users to securely communicate on the internet without compromising their privacy. It works by routing traffic through several servers, making it impossible for observers to trace the connection back to the user. Tor is the most widely used implementation of the Onion Routing design and improves upon the original design by allowing any server along the circuit to act as an exit point, making it harder to determine where traffic originated. Individuals, organizations, and governments all use Tor to keep communications private.
Tor is an anonymizing tool that protects users' privacy and anonymity online. It works by bouncing communications around a distributed network of volunteer-run relays around the world, making it difficult to trace the origin or destination of a user's traffic. Originally developed by the U.S. Naval Research Laboratory to protect government communications, Tor is now used freely by people seeking to browse the web anonymously, as well as journalists, activists, and others seeking to circumvent censorship or avoid surveillance.
Tor is an anonymity network that allows users to browse the web anonymously. It works by routing traffic through a series of volunteer servers, or relays, that encrypt and then randomly route data in an attempt to make it untraceable. The Tor browser bundles this routing technology to allow users to access the open web as well as "hidden services" anonymously. While Tor provides anonymity, it has some weaknesses including potential traffic analysis of autonomous systems and exit node eavesdropping. The presentation provides an overview of how Tor works and relays, how to use Tor safely, and some common services found on Tor.
Onion routing and tor: Fundamentals and Anonymityanurag singh
Onion Routing and Tor: Fundamentals and anonymity discusses anonymity on the internet and how Tor works to provide anonymity. It explains that traditional IP addresses and browser tracking can be linked to a user's identity. Tor creates circuits through multiple relay nodes to hide a user's location and communications. Key features of Tor include using volunteer-run relay nodes, protecting against traffic analysis, and enabling hidden services to host anonymous websites. While Tor enhances anonymity, it cannot prevent all timing attacks if the start and end of a user's traffic can be observed.
This document provides an overview of anonymity systems like Tor and I2P. It describes how Tor works by passing data through a series of proxies to hide a user's location and usage. The Tor Project is a non-profit organization that maintains the Tor network software to provide anonymity online. The document outlines potential attacks against Tor like traffic analysis, compromised relays, and social engineering. It also lists current sponsors and tools that can be used to access or configure the Tor network.
Onion routing is a technique for anonymous communication over a computer network. In an onion network, messages are encapsulated in layers of encryption, analogous to layers of an onion. The encrypted data is transmitted through a series of network nodes called onion routers, each of which "peels" away a single layer, uncovering the data's next destination. When the final layer is decrypted, the message arrives at its destination. The sender remains anonymous because each intermediary knows only the location of the immediately preceding and following nodes.
Onion routing was developed in the mid-1990s at the U.S. Naval Research to protect U.S. intelligence communications online. It was further developed by the Defence Advanced Research Projects Agency (DARPA) and patented by the Navy in 1998. Onion Routing is implemented The Onion Routing project or TOR project.
Tor is an anonymous communication network that allows users to securely communicate on the internet without revealing their location or identity. It works by routing a user's communications through a series of relay servers run by volunteers all around the world, making it difficult to trace the origin or destination of the communications. Tor protects users' privacy and anonymity through its onion routing technique which encrypts and then randomly bounces communications through multiple nodes. While Tor provides anonymity, it can also be used for illegal activities which presents challenges for its widespread adoption and use.
Types of Computer Forensics Technology, Types of Military Computer Forensic Technology, Types of Law Enforcement, Computer Forensic Technology, Types of Business Computer Forensic Technology, Specialized Forensics Techniques, Hidden Data and How to Find It, Spyware and Adware, Encryption Methods and Vulnerabilities, Protecting Data from Being Compromised Internet Tracing Methods, Security and Wireless Technologies, Avoiding Pitfalls with Firewalls Biometric Security Systems
This seminar discuss about the TOR BROWSER NETWORK TECHNOLOGY. The discussion includes, How it works, its weakness, its advantage, hidden services, about anonymity etc.
Topics covered are:
-What is Onion Routing?
-What is Tor onion routing?
-How is Tor different from other proxies?
-How Tor works?
-Advantages of Tor
-Disadvantages of Tor
-Tor .onion domains
-Deep web v/s Dark web
-Dark web
-The Hidden Wiki
This document discusses mobile device forensics. It explains that mobile devices store a variety of personal information, including calls, texts, emails, photos and more. It also outlines the challenges of investigating mobile devices and describes the components of mobile devices like the IMEI, SIM card, and memory. The document provides details on acquiring data from mobile devices, including identifying the device, isolating it to prevent remote wiping, and extracting data from internal memory, SIM cards and external storage.
Security in the Internet Of Things.
Every IoT project must be designed with security in mind. Identity Relationship Management is a must for a successful IoT implementation.
Footprinting is an ethical hacking technique used to gather information about a target system or organization without directly interacting with it. It involves collecting data on the target's network configuration, operating systems, employee contact information, and more. There are two main types: active footprinting uses tools like ping sweeps to directly probe the target, while passive footprinting uses public sources like search engines and social media. The goal is to identify security weaknesses before actually planning an attack.
Onion routing is an anonymous communication technique that encrypts and routes traffic through multiple network nodes, making it difficult to trace. It works by having a client connect to a Tor network node, which encrypts the connection and passes it to another node, and so on through several nodes, with each node only knowing the previous and next hops. This creates an encrypted circuit through the network that separates identification of the user from message routing to provide anonymity.
The dark web is a large portion of the internet not accessible through regular search engines and browsers. It can only be accessed through specific browsers like Tor that provide anonymity. While some use it for privacy, the dark web is known for illegal activities like buying and selling drugs, hiring hackers and hitmen, and trafficking weapons and stolen information.
It has all details related to cyber security information hiding.It mainly focuses on steganography and its major details.The ppt also shows is applications.
This document discusses wireless network security. It begins by outlining the security requirements of authentication, confidentiality, integrity, non-repudiation, availability, and detection/isolation. It then discusses threats to wireless networks like eavesdropping, denial of service attacks, and man-in-the-middle attacks. Finally, it outlines methods to secure wireless networks, including using encryption, changing default passwords, and implementing the 802.11i security standard to authenticate devices and securely transmit data through techniques like WPA2.
Ethical hacking Chapter 7 - Enumeration - Eric VanderburgEric Vanderburg
This document discusses the process of enumeration in ethical hacking. Enumeration extracts information about network resources, user accounts, and operating systems. It describes tools for enumerating Microsoft systems like Nbtstat, Netview, and Net use, as well as tools for NetWare like Novell Client32 and Nessus. For *NIX systems, common enumeration tools are Finger and Nessus. The goal of enumeration is to gather useful information about targets without authorization in the scope of a security assessment.
The Deep Web, TOR Network and Internet AnonymityAbhimanyu Singh
Presentation Contents:
Introduction to Deep Web, Contents of the Deep Web, Accessing the Deep Web, Advisement, Deep Web vs. Surface Web, Importance of Anonymity and Privacy, and Conclusions.
This document discusses bluejacking, which is the sending of unsolicited messages to Bluetooth devices using Bluetooth technology. It begins with an introduction to bluejacking and Bluetooth technology. It then discusses the origin of the term "bluejack" from a Malaysian IT consultant. It provides details on how bluejacking works using Bluetooth, vCards, and the OBEX protocol. It discusses how to bluejack using software tools and the ethics of bluejacking. It also covers related concepts like bluesnarfing and security issues with Bluetooth. The document concludes with advantages and disadvantages of bluejacking as well as future applications of the technology.
This ppt includes what is wireless hacking, types of wi-fi eg,wep,wpa,wpa/psk and terms related to it .this also conclude how to crack the wireless hacking ,the tools and commands required for it. this is very usefull . catch it..... :)
Here are the key advantages of a packet-filtering router firewall:
- Simple and fast - Packet filtering is a simple and fast operation as it only examines packet headers. This makes packet filtering routers suitable for high traffic networks.
- Low cost - Packet filtering routers are generally lower in cost compared to other firewall types as they utilize existing router hardware and software.
- Flexible rulesets - Packet filtering allows for flexible rulesets that can block or allow packets based on many header fields like source/destination IP, port, protocol type etc.
- Transparency - Packet filtering operates at the network/transport layers so it is transparent to users and applications.
- Performance - Packet filtering has minimal impact on network performance since
The document discusses several modes of operation for block ciphers and stream ciphers. It explains that block cipher modes like CBC, CFB, OFB, and Counter Mode require an initialization vector (IV) to provide randomization and prevent identical plaintext blocks from encrypting to the same ciphertext. The IV must be transmitted along with the ciphertext and never reused with the same key. Stream ciphers like RC4 generate a pseudorandom key stream that is XORed with plaintext bytes to produce ciphertext.
Network traffic analysis with cyber securityKAMALI PRIYA P
We are students from SRM University pursuing B.TECH in Computer Science Department. We took a small initiative to make a PPT about how network traffic can be analyzed through Cyber Security. We have also mentioned the known network analyzers and future scope for network traffic analysis with cyber security.
Investigative Tools and Equipments for Cyber Crime by Raghu KhimaniDr Raghu Khimani
Details of which tools and equipment can be used for investigating cybercrime are explained well in the easy language. Also, Data Recovery is explained well.
Cyberoam offers next-generation firewall and UTM firewall that provide stateful and deep packet inspection for network, application and user identity-based security. Cyberoam firewall appliances provide ease of management and high security with flexibility.
Data security in local network using distributed firewall ppt Sabreen Irfana
Distributed firewalls provide data security in LANs by enforcing security policies at network endpoints rather than a single centralized firewall. This overcomes issues with traditional firewalls like single points of failure, restricted topologies, and an assumption that inside users are trusted. A distributed firewall uses a central management system to define security policies which are then enforced by policy agents on endpoints using public key certificates for authentication. This allows filtering of both internal and external traffic according to the security policy.
Consent Receipts: The Future of Personal Data - Michele Nati - Lead Technolog...MicheleNati
This document summarizes Michele Nati's presentation on consent receipts at the MyData 2016 conference. The presentation discussed the potential for consent receipts to standardize and provide transparency around personal data sharing. It described how consent receipts could document an individual's consent to have their data processed and shared. The presentation also outlined a proposed process for issuing consent receipts and the development of a consent receipt ecosystem involving various stakeholders. It discussed early trials conducted to explore the design and value of consent receipts from consumers' perspectives.
This seminar discuss about the TOR BROWSER NETWORK TECHNOLOGY. The discussion includes, How it works, its weakness, its advantage, hidden services, about anonymity etc.
Topics covered are:
-What is Onion Routing?
-What is Tor onion routing?
-How is Tor different from other proxies?
-How Tor works?
-Advantages of Tor
-Disadvantages of Tor
-Tor .onion domains
-Deep web v/s Dark web
-Dark web
-The Hidden Wiki
This document discusses mobile device forensics. It explains that mobile devices store a variety of personal information, including calls, texts, emails, photos and more. It also outlines the challenges of investigating mobile devices and describes the components of mobile devices like the IMEI, SIM card, and memory. The document provides details on acquiring data from mobile devices, including identifying the device, isolating it to prevent remote wiping, and extracting data from internal memory, SIM cards and external storage.
Security in the Internet Of Things.
Every IoT project must be designed with security in mind. Identity Relationship Management is a must for a successful IoT implementation.
Footprinting is an ethical hacking technique used to gather information about a target system or organization without directly interacting with it. It involves collecting data on the target's network configuration, operating systems, employee contact information, and more. There are two main types: active footprinting uses tools like ping sweeps to directly probe the target, while passive footprinting uses public sources like search engines and social media. The goal is to identify security weaknesses before actually planning an attack.
Onion routing is an anonymous communication technique that encrypts and routes traffic through multiple network nodes, making it difficult to trace. It works by having a client connect to a Tor network node, which encrypts the connection and passes it to another node, and so on through several nodes, with each node only knowing the previous and next hops. This creates an encrypted circuit through the network that separates identification of the user from message routing to provide anonymity.
The dark web is a large portion of the internet not accessible through regular search engines and browsers. It can only be accessed through specific browsers like Tor that provide anonymity. While some use it for privacy, the dark web is known for illegal activities like buying and selling drugs, hiring hackers and hitmen, and trafficking weapons and stolen information.
It has all details related to cyber security information hiding.It mainly focuses on steganography and its major details.The ppt also shows is applications.
This document discusses wireless network security. It begins by outlining the security requirements of authentication, confidentiality, integrity, non-repudiation, availability, and detection/isolation. It then discusses threats to wireless networks like eavesdropping, denial of service attacks, and man-in-the-middle attacks. Finally, it outlines methods to secure wireless networks, including using encryption, changing default passwords, and implementing the 802.11i security standard to authenticate devices and securely transmit data through techniques like WPA2.
Ethical hacking Chapter 7 - Enumeration - Eric VanderburgEric Vanderburg
This document discusses the process of enumeration in ethical hacking. Enumeration extracts information about network resources, user accounts, and operating systems. It describes tools for enumerating Microsoft systems like Nbtstat, Netview, and Net use, as well as tools for NetWare like Novell Client32 and Nessus. For *NIX systems, common enumeration tools are Finger and Nessus. The goal of enumeration is to gather useful information about targets without authorization in the scope of a security assessment.
The Deep Web, TOR Network and Internet AnonymityAbhimanyu Singh
Presentation Contents:
Introduction to Deep Web, Contents of the Deep Web, Accessing the Deep Web, Advisement, Deep Web vs. Surface Web, Importance of Anonymity and Privacy, and Conclusions.
This document discusses bluejacking, which is the sending of unsolicited messages to Bluetooth devices using Bluetooth technology. It begins with an introduction to bluejacking and Bluetooth technology. It then discusses the origin of the term "bluejack" from a Malaysian IT consultant. It provides details on how bluejacking works using Bluetooth, vCards, and the OBEX protocol. It discusses how to bluejack using software tools and the ethics of bluejacking. It also covers related concepts like bluesnarfing and security issues with Bluetooth. The document concludes with advantages and disadvantages of bluejacking as well as future applications of the technology.
This ppt includes what is wireless hacking, types of wi-fi eg,wep,wpa,wpa/psk and terms related to it .this also conclude how to crack the wireless hacking ,the tools and commands required for it. this is very usefull . catch it..... :)
Here are the key advantages of a packet-filtering router firewall:
- Simple and fast - Packet filtering is a simple and fast operation as it only examines packet headers. This makes packet filtering routers suitable for high traffic networks.
- Low cost - Packet filtering routers are generally lower in cost compared to other firewall types as they utilize existing router hardware and software.
- Flexible rulesets - Packet filtering allows for flexible rulesets that can block or allow packets based on many header fields like source/destination IP, port, protocol type etc.
- Transparency - Packet filtering operates at the network/transport layers so it is transparent to users and applications.
- Performance - Packet filtering has minimal impact on network performance since
The document discusses several modes of operation for block ciphers and stream ciphers. It explains that block cipher modes like CBC, CFB, OFB, and Counter Mode require an initialization vector (IV) to provide randomization and prevent identical plaintext blocks from encrypting to the same ciphertext. The IV must be transmitted along with the ciphertext and never reused with the same key. Stream ciphers like RC4 generate a pseudorandom key stream that is XORed with plaintext bytes to produce ciphertext.
Network traffic analysis with cyber securityKAMALI PRIYA P
We are students from SRM University pursuing B.TECH in Computer Science Department. We took a small initiative to make a PPT about how network traffic can be analyzed through Cyber Security. We have also mentioned the known network analyzers and future scope for network traffic analysis with cyber security.
Investigative Tools and Equipments for Cyber Crime by Raghu KhimaniDr Raghu Khimani
Details of which tools and equipment can be used for investigating cybercrime are explained well in the easy language. Also, Data Recovery is explained well.
Cyberoam offers next-generation firewall and UTM firewall that provide stateful and deep packet inspection for network, application and user identity-based security. Cyberoam firewall appliances provide ease of management and high security with flexibility.
Data security in local network using distributed firewall ppt Sabreen Irfana
Distributed firewalls provide data security in LANs by enforcing security policies at network endpoints rather than a single centralized firewall. This overcomes issues with traditional firewalls like single points of failure, restricted topologies, and an assumption that inside users are trusted. A distributed firewall uses a central management system to define security policies which are then enforced by policy agents on endpoints using public key certificates for authentication. This allows filtering of both internal and external traffic according to the security policy.
Consent Receipts: The Future of Personal Data - Michele Nati - Lead Technolog...MicheleNati
This document summarizes Michele Nati's presentation on consent receipts at the MyData 2016 conference. The presentation discussed the potential for consent receipts to standardize and provide transparency around personal data sharing. It described how consent receipts could document an individual's consent to have their data processed and shared. The presentation also outlined a proposed process for issuing consent receipts and the development of a consent receipt ecosystem involving various stakeholders. It discussed early trials conducted to explore the design and value of consent receipts from consumers' perspectives.
Personal data and blockchain: Opportunities and Challenges - Michele Nati - L...MicheleNati
The document discusses opportunities and challenges around using blockchain technology for personal data. It outlines financial benefits of sharing personal data but also barriers around trust, consent, and control. Blockchain could help create a personal data ecosystem by linking data together, granting access and control, and building trust between parties. However, challenges include privacy, identity verification, and dealing with malicious behavior. Governance is also an open issue in decentralized systems like blockchain.
Onion routing provides anonymity to users on the internet. It works by encrypting data multiple times and routing it through several intermediate servers, known as onion routers, hiding the origin and destination from each router. When a user wants to communicate anonymously, onion routing first establishes a encrypted circuit through the routers. It then opens a stream through this circuit to send data back and forth between the user and destination while preserving anonymity. Each router only knows the previous and next hops in the circuit, not the complete path. Periodically, new circuits are formed to further improve anonymity.
To dice an onion: score and peel the onion, cut it in half lengthwise, then slice it widthwise about 1/2 cm thick, leaving the root end intact. To saute the diced onion: heat oil in a fry pan over medium-high heat, add the diced onion and stir constantly until pale and translucent.
This document discusses different types of anonymous networks and how they provide anonymity for internet users. It introduces mix networks, peer-to-peer networks and other approaches that aim to hide a user's identity and communications. The document outlines various anonymous network architectures including centralized high-latency systems, centralized low-latency systems, and distributed/pseudo-distributed networks. It also discusses some of the challenges of providing anonymity including various attack approaches adversaries may use to try and de-anonymize networks.
The document discusses the onion network architecture and how it provides anonymity to users. It explains how the Tor network uses layers of encryption and routing through different nodes, called onion routing, to anonymize a user's location and activity. Key aspects covered include how public-private key cryptography enables setting up anonymous circuits through the network, how hidden services allow anonymous hosting of websites, and some of the limitations and weaknesses of using Tor.
This document discusses anonymous connections and onion routing. It describes how onion routing allows senders and receivers to communicate anonymously through intermediate nodes called onion routers. It outlines the steps of defining a route, constructing an anonymous connection and onion, moving the onion through the connection, and destroying the connection. The purpose of onion routing is to protect the anonymity of network users and make communications resistant to eavesdropping and other attacks.
TOR (The Onion Routing) is a free tool that allows anonymous use of the internet. It was developed by the US Naval Research Laboratory. TOR anonymizes internet traffic by routing it through several volunteer relays run by the TOR network, encrypting the traffic layer by layer and preventing others from seeing the user's IP address. Various groups use TOR including normal users, journalists, activists and law enforcement to maintain anonymity online, though the final link in the routing is not encrypted and slow network speeds are a limitation. Proper security measures must be taken when using TOR to ensure privacy is maintained.
Onions are a species in the genus Allium that are native to Central Asia. They have upright green leaves attached to a swollen bulb underground. Common varieties include red, white and yellow onions. Different varieties bulb at different daylight hours, with long day bulbs requiring more light. Onions are available seasonally from spring through winter.
Routing protocols allow routers to communicate and exchange information that helps determine the best path between networks. The main types are static routing, where routes are manually configured, and dynamic routing, where routes are automatically updated as network conditions change. Common dynamic routing protocols include RIP, IGRP, EIGRP, and OSPF, which use different algorithms and metrics like hop count or bandwidth to calculate the best routes.
Bitcoin and Blockchain Technology Explained: Not just Cryptocurrencies, Econo...Melanie Swan
The blockchain concept may be one of the most transformative ideas to impact the world since the Internet. It represents a new organizing paradigm for all activity and integrates humans and technology. Cryptocurrencies like bitcoin are merely one application of the blockchain concept. The blockchain is a public transaction ledger built in a network structure based on cryptographic principles so there does not need to be a centralized intermediary. Any kind of asset (art, car, home, financial contract) may be encoded into the blockchain and transacted, validated, or preserved in a much more efficient manner than at present including ideas, health data, financial assets, automobiles, and government documents. Blockchain technology applies well beyond cryptocurrencies, economics, and markets to all venues of human information processing, collaboration, and interaction including art, health, and literacy.
Anonymous Traffic Network provides an overview of Tor and anonymous communication networks. It discusses the history of onion routing starting in 1995 and the launch of the Tor network in 2003. It describes how Tor works using layered encryption and frequently changing paths between routers to anonymize users. While Tor aims to anonymize users, there are some security issues like exit nodes being able to monitor unencrypted traffic and timing analysis attacks.
Presentation of "Anonymity in the web based on routing protocols" technical report developed for the Web Security course of the Master Degree in Engineering in Computer Science curriculum in Cyber Security at University of Rome "La Sapienza".
Link: https://www.slideshare.net/BiagioBotticelli/anonymity-in-the-web-based-on-routing-protocols
The document provides an overview of the Tor Browser and how the Tor network functions to provide anonymity to users. It discusses how Tor uses onion routing to encrypt data and pass it through multiple nodes, or relays, so that no single point on the network can identify both the origin and destination of the data. It details how the Tor Browser is built on Firefox and includes extra privacy and security features. It also examines the technical aspects of how data is passed through the Tor network in cells and circuits to hide a user's location and activity.
The document outlines the Tor network, including its history, design, components, and how it works. Tor allows for anonymous communication by routing traffic through a distributed network of relays run by volunteers. It improves on earlier designs like Chaum mixes by having no mixing, padding, or traffic shaping, and supports many TCP streams per circuit. The document discusses cells, circuit creation, congestion control, hidden services, advantages/disadvantages, and attacks/defenses.
Overlay networks are virtual networks built on top of existing networks that add additional layers of indirection. There are several types of overlay networks including caching, routing, and security overlays. Two examples of anonymous communication networks are ACN and I2P. I2P uses "garlic routing" which involves layered encryption, bundling multiple messages together, and ElGamal/AES encryption. It has a distributed, self-organizing design and uses short-lived, unidirectional tunnels to provide anonymity through its network.
Information security using onion routing(tor)Kaustubh Joshi
Tor is an anonymity network that allows users to access the internet anonymously. It works by routing connections through a series of volunteer relays run by other Tor users, making it difficult to trace the connection back to the original user. There are three types of relays - entry/guard relays, middle relays, and exit relays. Data is encrypted multiple times and sent through the relays, with each relay decrypting one layer of encryption. This prevents any single relay from knowing both the IP address of the user and the destination they are connecting to. Tor provides anonymity but is slower than a VPN. A VPN provides privacy by masking the user's IP address but does not provide the same level of anonymity as Tor since
This second-generation Onion Routing system addresses limitations in the original design by adding perfect forward secrecy, congestion control, directory servers, integrity checking, configurable exit policies, and a practical design for location-hidden services via rendezvous points. Tor works on the real-world Internet, requires no special privileges or kernel modifications, requires little synchronization or coordination between nodes, and provides a reasonable tradeoff between anonymity, usability, and efficiency.
This document provides an overview of the Tor anonymity network. It discusses how Tor aims to conceal users' identities and online activity by routing data through at least three different routers, with encryption at each node except the beginning and end. The document outlines Tor's history and how it works, addressing its weaknesses, typical users, and licit and illicit uses. It also includes an agenda, abstract, timeline, and references.
The document discusses the Tor network, which provides anonymity online. It begins by explaining what Tor is - an open source project that routes traffic through multiple servers to hide a user's location and activities. It then discusses why anonymity is needed, such as to protect privacy from advertisers, employers, or governments. The document goes on to explain how normal internet connections work without anonymity compared to how Tor creates anonymous circuits through multiple servers to encrypt traffic. It also discusses who uses Tor, such as journalists and activists seeking privacy, as well as some dangers like traffic analysis. Finally, it concludes that Tor has become very widely used and effective at providing mutual anonymity online.
SECURE LOCATION BASED ROUTING FOR MANETSAnkur Singhal
The video demonstrates sending the file from source to the destination by initially encrypting it using multihops and then decrypting it at the receiver's end
In this PPT you can learn a firewall and types which help you a lot and you can able to understand. So, that you must read at once I sure that you are understand
Thank you!!!
I
Black Hole Attack:
A malicious node advertises the wrong paths as good paths to the source node during the pathfinding process.
When the source selects the path including the attacker node, the traffic starts passing through the adversary node and this node starts dropping the packets selectively or in whole.
Black hole region is the entry point to a large number of harmful attacks.
The transport layer provides end-to-end communication over a network by providing services such as connection-oriented communication, reliability, flow control, and multiplexing. It links the application layer to the network layer and performs functions like segmenting messages and establishing connections between endpoints. Common transport protocols are TCP, which provides connection-oriented and reliable data transfer, and UDP, which provides connectionless datagram delivery.
The document discusses anonymity and anonymous file sharing systems. It begins with definitions of anonymity and different levels of anonymity that systems aim to achieve. It then outlines several theoretical designs for anonymous systems, including proxy-based networks, mix networks, onion routing, and friend-to-friend networks. Finally, it examines several existing anonymous file sharing systems such as Mute, Ants, Mantis, and Tor that implement these theoretical designs.
Tor is a free tool that allows users to browse the internet anonymously. It works by routing internet traffic through a network of volunteers around the world, preventing others from seeing what sites a user visits. Originally created by the U.S. Naval Research Laboratory to protect government communications, Tor has since been adopted by normal users, journalists, activists, and others seeking privacy online or wanting to access censored sites. It encrypts data and routes it through several volunteer nodes, removing layers of encryption at each stop to hide a message's origin, destination, and contents from intermediaries.
AASR Authenticated Anonymous Secure Routing for MANETs in Adversarial Environ...AAKASH S
The document discusses a routing protocol called AASR for mobile ad hoc networks (MANETs) operating in adversarial environments. The objectives of AASR are to provide anonymity, location privacy, and defend against active attacks while maintaining throughput and reducing packet loss. It aims to achieve this through the use of group signatures, onion routing, and trapdoors to hide the identities of nodes and destinations of packets. The document reviews related work on onion routing, group signatures, and anonymous on-demand routing protocols. It also outlines some attacks on MANETs like location privacy attacks and discusses how the proposed framework uses techniques like trapdoors, asymmetric keys, and pseudonyms to make routing anonymous and untraceable.
Securing BGP: Operational Strategies and Best Practices for Network Defenders...APNIC
Md. Zobair Khan,
Network Analyst and Technical Trainer at APNIC, presented 'Securing BGP: Operational Strategies and Best Practices for Network Defenders' at the Phoenix Summit held in Dhaka, Bangladesh from 23 to 24 May 2024.
Honeypots Unveiled: Proactive Defense Tactics for Cyber Security, Phoenix Sum...APNIC
Adli Wahid, Senior Internet Security Specialist at APNIC, delivered a presentation titled 'Honeypots Unveiled: Proactive Defense Tactics for Cyber Security' at the Phoenix Summit held in Dhaka, Bangladesh from 23 to 24 May 2024.
HijackLoader Evolution: Interactive Process HollowingDonato Onofri
CrowdStrike researchers have identified a HijackLoader (aka IDAT Loader) sample that employs sophisticated evasion techniques to enhance the complexity of the threat. HijackLoader, an increasingly popular tool among adversaries for deploying additional payloads and tooling, continues to evolve as its developers experiment and enhance its capabilities.
In their analysis of a recent HijackLoader sample, CrowdStrike researchers discovered new techniques designed to increase the defense evasion capabilities of the loader. The malware developer used a standard process hollowing technique coupled with an additional trigger that was activated by the parent process writing to a pipe. This new approach, called "Interactive Process Hollowing", has the potential to make defense evasion stealthier.
2. ONION ROUTING OVERVIEW
• Onion routing is a technique for anonymous communication over a computer network. Messages are
repeatedly encrypted and then sent through several network nodes called onion routers. Like someone
peeling an onion, each onion router removes a layer of encryption to uncover routing instructions, and
sends the message to the next router where this is repeated. This prevents these intermediary nodes
from knowing the origin, destination, and contents of the message.
• Onion routing was developed by Michael G. Reed (formerly of Extreme Networks), Paul F. Syverson, and
David M. Goldschlag, and patented by the United States Navy in US Patent No. 6266704 (1998). As of
2009, Tor is the predominant technology that employs onion routing.
3. CAPABILITIES OF ONION ROUTING
• The idea of onion routing (OR) is to protect the privacy of the sender and recipient of a message, while
also providing protection for message content as it traverses a network.
• Onion routing accomplishes this according to the principle of Chaum's mix cascades: messages travel
from source to destination via a sequence of proxies ("onion routers"), which re-route messages in an
unpredictable path. To prevent an adversary from eavesdropping on message content, messages are
encrypted between routers. The advantage of onion routing (and mix cascades in general) is that it is
not necessary to trust each cooperating router; if any router is compromised, anonymous
communication can still be achieved. This is because each router in an OR network accepts messages,
re-encrypts them, and transmits to another onion router. An attacker with the ability to monitor every
onion router in a network might be able to trace the path of a message through the network, but an
attacker with more limited capabilities will have difficulty even if he or she controls routers on the
message's path.
• Onion routing does not provide perfect sender or receiver anonymity against all
possible eavesdroppers—that is, it is possible for a local eavesdropper to observe that an individual has
sent or received a message. It does provide for a strong degree of unlinkability, the notion that an
eavesdropper cannot easily determine both the sender and receiver of a given message. Even within
these confines, onion routing does not provide any guarantee of privacy; rather, it provides a continuum
in which the degree of privacy is generally a function of the number of participating routers versus the
number of compromised or malicious routers.
5. ROUTING ONIONS
• A routing onion (or just onion) is a data structure formed by 'wrapping' a plaintext message with
successive layers of encryption, such that each layer can be 'unwrapped' (decrypted) like the layer of an
onion by one intermediary in a succession of intermediaries, with the original plaintext message only
being viewable by at most:
• the sender
• the last intermediary (the exit node)
• the recipient
• If there is end-to-end encryption between the sender and the recipient, then not even the last
intermediary can view the original message; this is similar to a game of 'pass the parcel'. An
intermediary is traditionally called a node or router.
7. CIRCUIT ESTABLISHMENT
• The originator picks nodes from a list provided by a special node called the directory node (traffic between the
originator and the directory node may also be encrypted or otherwise anonymised or decentralised); the chosen
nodes are ordered to provide a path through which the message may be transmitted; this ordering of the nodes is
called a chain or a circuit. No node within the circuit, except for the exit node, can infer where in the chain it is
located, and no node can tell whether the node before it is the originator or how many nodes are in the circuit.
• Using asymmetric key cryptography, the originator uses the public key (obtained from the directory) of the first node
in the circuit, known as the entry node, to send it an encrypted message, called a create cell, containing:
• A circuit ID. The circuit ID is random and different for each connection in the chain.
• A request for the receiving node (i.e. the entry node in this case) to establish a circuit with the originator.
• The originator's half of a Diffie-Hellman handshake (to establish a shared secret).
• The entry node, which just received one half of the handshake, replies to the originator, in unencrypted plaintext:
• The entry node's half of the Diffie-Hellman handshake.
• A hash of the shared secret, so that the originator can verify that he/she and the entry node share the same
secret.
• Now the entry node and originator use their shared secret for encrypting all their correspondence in symmetric
encryption (this is significantly more efficient than using asymmetric encryption). The shared secret is referred to as
a session key.
8. • A relay cell, as opposed to a command cell like the create cell used in the first step, is not interpreted by
the receiving node, but relayed to another node. Using the already established encrypted link, the
originator sends the entry node a relay extend cell, which is like any relay cell, only that it contains a
create cell intended for the next node (known as the relay node) in the chain, encrypted using the relay
node's public key and relayed to it by the entry node, containing the following:
• A circuit ID. Once again, it is arbitrary, and is not necessarily the same for this connection as it is for the
previous.
• A request from the entry node to the relay node to establish a circuit.
• The originator's half of a Diffie-Hellman handshake. Once again, the new node cannot tell whether this
handshake originated from the first node or the originator, it is irrelevant for operating the chain.
• The relay node, similar to the first step, replies with its half of the handshake in plain text along with a
hash of the shared secret.
• As the entry node - relay node circuit has been established, the entry node replies to the originator with
a relay extended cell, telling it that the chain has been extended, and containing the hash of the shared
secret along with the relay node's half of the handshake. The originator and the relay node now share a
secret key.
• To extend the chain further, the originator sends the entry node a relay cell which contains a relay cell
that only the relay node can decrypt, instructing the relay node to extend the chain further. The process
can be repeated as above to as many nodes as possible. In Tor, for example, chains are limited to 3
nodes: the entry node, the relay node, and the exit node.
9. DATA STRUCTURE : SENDING DATA
•{RELAY C1:
• [RELAY C2:
• (Send HTTP request to IP-of-webpage)]}
Where curly brackets indicate content encrypted with the entry node's shared key, square brackets content encrypted with the relay
node's key, and regular brackets content encrypted with the exit node's key.
Upon receiving the cell, the entry node only sees the following:
• RELAY C1:
• ENCRYPTED CONTENT
The entry node knows that relay requests for circuit ID 1 (C1) should be relayed to circuit ID 2 (C2), since it received a request from the
originator to extend the circuit earlier. For this reason, there is no need for the originator to know the circuit IDs, it is enough for it to tell the
entry node which circuit it refers to. The entry node takes the payload and sends a relay cell to the relay node.
Upon receiving the relayed cell from the entry node, the relay node sees the following:
• RELAY C2:
ENCRYPTED CONTENT
The relay node follows the same protocol as the entry node and relays the payload to the exit node. The exit node sees this:
•RELAY C3:
Send HTTP request to IP-of-webpage
The exit node proceeds to sending an HTTP request to the website.
11. TOR : INCEPTION
• Tor was originally designed, implemented, and deployed as a third-generation
onion routing project of the U.S. Naval Research
Laboratory. It was originally developed with the U.S. Navy in mind,
for the primary purpose of protecting government
communications. Today, it is used every day for a wide variety of
purposes by normal people, the military, journalists, law
enforcement officers, activists, and many others.
12. TOR: OVERVIEW
• Tor (originally short for The Onion Router) is free software for enabling online anonymity. Tor directs Internet
traffic through a free, worldwide volunteer network consisting of more than three thousand relays to conceal a
user's location or usage from anyone conducting network surveillance or traffic analysis. Using Tor makes it
more difficult to trace Internet activity, including "visits to Web sites, online posts, instant messages and other
communication forms", back to the user and is intended to protect users' personal privacy, freedom, and ability
to conduct confidential business by keeping their internet activities from being monitored.
• "Onion Routing" refers to the layers of the encryption used. The original data, including its destination, are
encrypted and re-encrypted multiple times, and sent through a virtual circuit comprising successive, randomly
selected Tor relays. Each relay decrypts a "layer" of encryption to reveal only the next relay in the circuit in order
to pass the remaining encrypted data on to it. The final relay decrypts the last layer of encryption and sends the
original data, without revealing or even knowing its sender, to the destination. This method reduces the chance
of the original data being understood in transit and, more notably, conceals the routing of it.
• As the 2013 anonymity-stripping attacks on Freedom Hosting users demonstrated, it is often possible to attack
Tor users indirectly, e.g., via vulnerabilities in servers and web browsers.
14. HIDDEN SERVICES
• Tor also makes it possible for users to hide their locations while
offering various kinds of services, such as web publishing or an
instant messaging server. Using Tor "rendezvous points," other Tor
users can connect to these hidden services, each without knowing
the other's network identity. This hidden service functionality
could allow Tor users to set up a website where people publish
material without worrying about censorship. Nobody would be
able to determine who was offering the site, and nobody who
offered the site would know who was posting to it. Learn more
about configuring hidden services and how the hidden service
protocol works.
15. STAYING ANONYMOUS
• Tor can't solve all anonymity problems. It focuses only on protecting the
transport of data. You need to use protocol-specific support software if you
don't want the sites you visit to see your identifying information. For example,
you can use Torbutton while browsing the web to withhold some information
about your computer's configuration.
• Also, to protect your anonymity, be smart. Don't provide your name or other
revealing information in web forms. Be aware that, like all anonymizing
networks that are fast enough for web browsing, Tor does not provide
protection against end-to-end timing attacks: If your attacker can watch the
traffic coming out of your computer, and also the traffic arriving at your
chosen destination, he can use statistical analysis to discover that they are
part of the same circuit.
16. THE FUTURE OF TOR
• Providing a usable anonymizing network on the Internet today is an ongoing
challenge. We want software that meets users' needs. We also want to keep the
network up and running in a way that handles as many users as possible. Security
and usability don't have to be at odds: As Tor's usability increases, it will attract
more users, which will increase the possible sources and destinations of each
communication, thus increasing security for everyone. We're making progress,
but we need your help. Please consider running a relay or volunteering as
a developer.
• Ongoing trends in law, policy, and technology threaten anonymity as never
before, undermining our ability to speak and read freely online. These trends also
undermine national security and critical infrastructure by making communication
among individuals, organizations, corporations, and governments more
vulnerable to analysis. Each new user and relay provides additional diversity,
enhancing Tor's ability to put control over your security and privacy back into
your hands.
17. USERS OF TORS
• NORMAL PEOPLE
• MILITARY SERVICES
• NGO’s AND WHISTLEBLOWERS
• BLOGGERS
• LAW ENFORCEMENT OFFICERS
• JOURNALISTS AND THEIR AUDIENCE
• IT PROFESSIONALS
19. TOR BUTTON
Torbutton is integrated into Tor
Browser. Torbutton disables many
types of active content and threats
to your privacy when using a web
browser.
20. TOR BROWSER
BUNDLE
The Tor Browser Bundle
contains everything you
need to safely browse
the Internet. This
package requires no
installation. Just extract
it and run.
21. VIDALIA
Vidalia is a graphical Tor
controller. It allows you
to see where your
connections are in the
world and configure Tor
without getting into
configuration files and
code.
22. ORBOT
In collaboration with The
Guardian Project, we're
developing Tor on the Google
Android mobile operating system.
A related application is Orlib; a
library for use by any Android
application to route Internet
traffic through Orbot/Tor.
23. TORCLOUD
The Tor Cloud project gives you a
user-friendly way of deploying
bridges to help users access an
uncensored Internet via the
Amazon EC2 cloud. By setting up
a bridge, you donate bandwidth
to the Tor network and help
improve the safety and speed at
which users can access the
Internet. Get started with Tor
Cloud.
24. OBFSPROXY
Obfsproxy is a pluggable
transports proxy
written in C. It shapes
Tor traffic, making it
harder for censors to
detect and block the Tor
protocol.
25. SHADOW
Shadow is a discrete-event
network simulator that runs
the real Tor software as a
plug-in. Shadow is open-source
software that
enables accurate, efficient,
controlled, and repeatable
Tor experimenentation.
26. TOR2WEB
Tor2web allows Internet
users to browse websites
running in Tor hidden
services. It trades user
anonymity for usability by
allowing anonymous
content to be distributed to
non-anonymous users.