Seminar on Voip Challenges and Countermeasures
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This document summarizes a presentation on security challenges and defenses in VOIP infrastructure. It begins by defining VOIP and how it works, processing voice data over IP networks using protocols like SIP, RTP, and UDP. It then outlines common security concerns like denial of service attacks, eavesdropping, message tampering, toll fraud, and account manipulation. Specific attack vectors are described at the signaling and media layers, such as SIP hijacking, message modification, and RTP tampering. Defenses including separating voice and data traffic, configuration authentication, signaling authentication using IPsec, and media encryption using SRTP are proposed to secure the VOIP system from these attacks.
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Case study about voip
The document discusses how multi-service business gateways can secure enterprise VoIP networks by addressing various security threats. It outlines four categories of security threats to VoIP systems: network level threats, media threats, communication session threats, and application level threats. It then provides examples of network level threats like denial of service attacks and solutions like firewalls and VPNs. It also discusses securing RTP media by encrypting payloads and verifying integrity through hashing. Finally, it outlines how session border controllers within the business gateways can help secure communication sessions by preventing man-in-the-middle attacks and unauthorized session attempts through measures like encryption, access control lists, infrastructure hiding, and monitoring.
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This document discusses a fraud monitoring system for voice over internet protocol (VoIP) telephony. It begins with an introduction to VoIP and defines fraud. It then discusses the history of VoIP and how VoIP connections work. Key points discussed include quality of service requirements, protocols used in VoIP like SIP and H.323, and security challenges like dynamic addressing and firewalls. The document examines how a fraud management system could address these security issues to help secure VoIP networks.
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The document discusses techniques for detecting denial-of-service (DoS) attacks in Session Initiation Protocol (SIP)-based Voice over IP (VoIP) networks. It reviews several proposed detection mechanisms, including statistical detection using Hellinger's distance, a double-layered architecture using traffic scanning, and a distributed filtering mechanism. It also summarizes a mitigation mechanism that analyzes SIP messages and calls and a technique using entropy analysis to identify attacks. Overall, the document surveys different existing approaches for detecting DoS attacks that aim to disrupt availability in SIP-based VoIP networks.
VoIP and multimedia networking
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AN OVERVIEW OF VOICE OVER INTERNET PROTOCOL (VOIP
This document discusses Voice over Internet Protocol (VoIP) including its protocols, security issues, benefits, and challenges. It begins by introducing VoIP and describing its basic operation and advantages like lower costs. It then covers specific VoIP protocols like SIP and H.323. The document analyzes VoIP considerations like delay, jitter, packet loss, and discusses how these issues can affect call quality. It also provides an overview of VoIP technologies and their benefits for businesses. Finally, it presents a case study on assessing network readiness for VoIP deployment.
Voice over IP
This document discusses security issues related to Voice over Internet Protocol (VoIP). It begins by explaining what VoIP is and some of its early implementations. It then describes the basic protocols and protocol stacks used for VoIP signaling and sessions, including H.323, SIP, and RTP. The document outlines various roles in VoIP systems, such as administrators and operators. It identifies common attacks against VoIP networks like theft of service, man-in-the-middle attacks, IP spoofing, and denial-of-service attacks. It concludes that VoIP inherits security vulnerabilities from the Internet and that encryption, authentication, firewalls, and separating voice and data traffic are needed to secure VoIP networks.
AbstractVoice over Internet Protocol (VoIP) is an advanced t.docx
Abstract
Voice over Internet Protocol (VoIP) is an advanced telecommunication technology which transfers the voice/video over
high speed network that provides advantages of flexibility, reliability and cost efficient advanced telecommunication
features. Still the issues related to security are averting many organizations to accept VoIP cloud environment due to
security threats, holes or vulnerabilities. So, the novel secured framework is absolutely necessary to prevent all kind of
VoIP security issues. This paper points out the existing VoIP cloud architecture and various security attacks and issues
in the existing framework. It also presents the defense mechanisms to prevent the attacks and proposes a new security
framework called Intrusion Prevention System (IPS) using video watermarking and extraction technique and Liveness
Voice Detection (LVD) technique with biometric features such as face and voice. IPSs updated with new LVD features
protect the VoIP services not only from attacks but also from misuses.
A Comprehensive Survey of Security Issues and
Defense Framework for VoIP Cloud
Ashutosh Satapathy* and L. M. Jenila Livingston
School of Computing Science and Engineering, VIT University, Chennai - 600127, Tamil Nadu, India;
[email protected], [email protected]
Keywords: Defense Mechanisms, Liveness Voice Detection, VoIP Cloud, Voice over Internet Protocol, VoIP Security Issues
1. Introduction
The rapid progress of VoIP over traditional services is
led to a situation that is common to many innovations
and new technologies such as VoIP cloud and peer to
peer services like Skype, Google Hangout etc. VoIP is the
technology that supports sending voice (and video) over
an Internet protocol-based network1,2. This is completely
different than the public circuit-switched telephone net-
work. Circuit switching network allocates resources to
each individual call and path is permanent throughout
the call from start to end. Traditional telephony services
are provided by the protocols/components such as SS7, T
carriers, Plain Old Telephone Service (POTS), the Public
Switch Telephone Network (PSTN), dial up, local loops
and anything under International Telecommunication
Union. IP networks are based on packet switching and
each packet follows different path, has its own header and
is forwarded separately by routers. VoIP network can be
constructed in various ways by using both proprietary
protocols and protocols based on open standards.
1.1 VoIP Layer Architecture
VoIP communication system typically consist of a front
end platform (soft-phone, PBX, gateway, call manager),
back end platform (server, CPU, storage, memory, net-
work) and intermediate platforms such as VoIP protocols,
database, authentication server, web server, operating sys-
tems etc. It is mainly divided into five layers as shown in
Figure1.
1.2 VoIP Cloud Architecture
VoIP cloud is the framework for delivering telephony
services in which resourc.
AbstractVoice over Internet Protocol (VoIP) is an advanced t.docx
Abstract
Voice over Internet Protocol (VoIP) is an advanced telecommunication technology which transfers the voice/video over
high speed network that provides advantages of flexibility, reliability and cost efficient advanced telecommunication
features. Still the issues related to security are averting many organizations to accept VoIP cloud environment due to
security threats, holes or vulnerabilities. So, the novel secured framework is absolutely necessary to prevent all kind of
VoIP security issues. This paper points out the existing VoIP cloud architecture and various security attacks and issues
in the existing framework. It also presents the defense mechanisms to prevent the attacks and proposes a new security
framework called Intrusion Prevention System (IPS) using video watermarking and extraction technique and Liveness
Voice Detection (LVD) technique with biometric features such as face and voice. IPSs updated with new LVD features
protect the VoIP services not only from attacks but also from misuses.
A Comprehensive Survey of Security Issues and
Defense Framework for VoIP Cloud
Ashutosh Satapathy* and L. M. Jenila Livingston
School of Computing Science and Engineering, VIT University, Chennai - 600127, Tamil Nadu, India;
[email protected], [email protected]
Keywords: Defense Mechanisms, Liveness Voice Detection, VoIP Cloud, Voice over Internet Protocol, VoIP Security Issues
1. Introduction
The rapid progress of VoIP over traditional services is
led to a situation that is common to many innovations
and new technologies such as VoIP cloud and peer to
peer services like Skype, Google Hangout etc. VoIP is the
technology that supports sending voice (and video) over
an Internet protocol-based network1,2. This is completely
different than the public circuit-switched telephone net-
work. Circuit switching network allocates resources to
each individual call and path is permanent throughout
the call from start to end. Traditional telephony services
are provided by the protocols/components such as SS7, T
carriers, Plain Old Telephone Service (POTS), the Public
Switch Telephone Network (PSTN), dial up, local loops
and anything under International Telecommunication
Union. IP networks are based on packet switching and
each packet follows different path, has its own header and
is forwarded separately by routers. VoIP network can be
constructed in various ways by using both proprietary
protocols and protocols based on open standards.
1.1 VoIP Layer Architecture
VoIP communication system typically consist of a front
end platform (soft-phone, PBX, gateway, call manager),
back end platform (server, CPU, storage, memory, net-
work) and intermediate platforms such as VoIP protocols,
database, authentication server, web server, operating sys-
tems etc. It is mainly divided into five layers as shown in
Figure1.
1.2 VoIP Cloud Architecture
VoIP cloud is the framework for delivering telephony
services in which resourc ...
AbstractVoice over Internet Protocol (VoIP) is an advanced t.docx
Abstract
Voice over Internet Protocol (VoIP) is an advanced telecommunication technology which transfers the voice/video over
high speed network that provides advantages of flexibility, reliability and cost efficient advanced telecommunication
features. Still the issues related to security are averting many organizations to accept VoIP cloud environment due to
security threats, holes or vulnerabilities. So, the novel secured framework is absolutely necessary to prevent all kind of
VoIP security issues. This paper points out the existing VoIP cloud architecture and various security attacks and issues
in the existing framework. It also presents the defense mechanisms to prevent the attacks and proposes a new security
framework called Intrusion Prevention System (IPS) using video watermarking and extraction technique and Liveness
Voice Detection (LVD) technique with biometric features such as face and voice. IPSs updated with new LVD features
protect the VoIP services not only from attacks but also from misuses.
A Comprehensive Survey of Security Issues and
Defense Framework for VoIP Cloud
Ashutosh Satapathy* and L. M. Jenila Livingston
School of Computing Science and Engineering, VIT University, Chennai - 600127, Tamil Nadu, India;
[email protected], [email protected]
Keywords: Defense Mechanisms, Liveness Voice Detection, VoIP Cloud, Voice over Internet Protocol, VoIP Security Issues
1. Introduction
The rapid progress of VoIP over traditional services is
led to a situation that is common to many innovations
and new technologies such as VoIP cloud and peer to
peer services like Skype, Google Hangout etc. VoIP is the
technology that supports sending voice (and video) over
an Internet protocol-based network1,2. This is completely
different than the public circuit-switched telephone net-
work. Circuit switching network allocates resources to
each individual call and path is permanent throughout
the call from start to end. Traditional telephony services
are provided by the protocols/components such as SS7, T
carriers, Plain Old Telephone Service (POTS), the Public
Switch Telephone Network (PSTN), dial up, local loops
and anything under International Telecommunication
Union. IP networks are based on packet switching and
each packet follows different path, has its own header and
is forwarded separately by routers. VoIP network can be
constructed in various ways by using both proprietary
protocols and protocols based on open standards.
1.1 VoIP Layer Architecture
VoIP communication system typically consist of a front
end platform (soft-phone, PBX, gateway, call manager),
back end platform (server, CPU, storage, memory, net-
work) and intermediate platforms such as VoIP protocols,
database, authentication server, web server, operating sys-
tems etc. It is mainly divided into five layers as shown in
Figure1.
1.2 VoIP Cloud Architecture
VoIP cloud is the framework for delivering telephony
services in which resourc.
Analysis of VoIP Forensics with Digital Evidence Procedure
The invention of Voice over Internet Protocol (VoIP) in communication technology created significant attractive services for its users, it also brings new security threats. Criminals exploit these security threats to perform illegal activities such as VoIP malicious attacks, this will require digital forensic investigators to detect and provide digital evidence. Finding digital evidence in VoIP malicious attacks is the most difficult task, due to its associated features with converged network. In this paper, a Model of investigating VoIP malicious attacks is proposed for forensic analysis. VoIP spoofing is being a common and most important threat to the VoIP users. It is technically possible for an attacker to masquerade as another VoIP caller (VoIP spoofing). A design of a SIP which will try to capture all of the data on a VoIP network and process it for forensic analysis with also detection of the spoofing or the fake caller address.
Voice over IP (VOIP) Security Research- A Research
This document summarizes research on Voice over IP (VoIP) security. It begins with an overview of SIP (Session Initiation Protocol), a commonly used VoIP standard, and a taxonomy of VoIP security threats. It then surveys existing research on VoIP security classified according to the threat categories. The research covers threats like eavesdropping, denial of service attacks, toll fraud, and spam over IP telephony (SPIT). Approaches studied include encryption, authentication, reputation systems, audio fingerprinting, and Turing tests to detect automated SPIT callers. The goal is to identify gaps and guide future work on analyzing VoIP attackers and improving the security and resilience of VoIP systems.
Session initiation protocol security considerations
Session Initiation Protocol (SIP) is a protocol for signalling multimedia sessions
with one or more participants. SIP is an application layer control protocol to initiate
and control user sessions. It is used in call set-up signalling for IP telephony, instead
of SS7 for circuit switching network. SIP is becoming popular in IP networking.
This paper presents and analyses some threats and attacks that SIP is vulnerable to.
These threats and attacks set the requirements for security mechanisms that are used
to make SIP more secure. This paper examines some of these security mechanisms.
In order to present and analyse the security threats and the security mechanisms they
are divided into different aspects of security. Privacy protection issues of SIP are also
discussed in this paper.
Raisul Haq Rajib (063435056)
The document provides an overview of security requirements and constraints for voice over IP (VoIP) systems. It discusses security characteristics of existing VoIP protocols like H.323 and SIP, including authentication and encryption capabilities. It then lists key security requirements for VoIP like dynamic firewall control, bandwidth management, and encryption of signaling and media traffic. Finally, it analyzes security constraints imposed by factors like delay sensitivity of real-time voice, which can impact the use of public-key cryptography for authentication between all devices in the network.
V3I6-0108
1) VoIP conversations are vulnerable to eavesdropping attacks where an attacker can detect phrases in a conversation without hearing the actual audio. Phrase spotting techniques allow this by analyzing encoded voice data.
2) To defend against eavesdropping, the authors propose padding packets to a fixed length and applying encryption. Low bit rate sections of audio are padded and noise is added before encryption.
3) At the receiver, noise is removed after decryption to reconstruct the original audio. Simulation results show this technique reduces errors compared to no defense. Implementing stronger encryption algorithms could further improve security.
Positive Hack Days. Gritsai. VOIP insecurities workshop
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1) The document discusses security challenges and threats in VoIP networks, including eavesdropping, toll fraud, denial of service attacks, spam over internet telephony, and pharming attacks.
2) It proposes several defense measures to prevent these threats, such as intrusion detection systems, filtering techniques to resist spam, and load balancing algorithms to mitigate flash crowd attacks.
3) The vulnerabilities of VoIP networks arise because they use the open Internet for transmission, leaving them exposed to the security issues that exist on IP-based networks.
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A Powerpoint Presentation with ho'made illustrations and a hidden eye-blink animation at the end. From 10 years ago.
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Seminar on Voip Challenges and Countermeasures
- 1. Govt. Engineering College Bikaner A SEMINAR Presentation ON SECURITY CHALLENGE AND DEFENSE IN VOIP INFRASTRUCTURE Presentation By: Deepak Kumar Mishra Information Technology FINAL YEAR
- 2. WHAT IS VOIP Voice over internet protocol : Allows user to to make calls using broadband internet Connection instead of analog phone line. Uses packet-switched network replace circuit switched network. VOIP DATA PROCESSING SIGNALING (H.323 , SIP ) ENCODING AND TRANSPORT (analog to digital , RTP , UDP) GATEWAY CONTROL (format conversion )
- 4. Fig. 1. (a) Typical VoIP network structure. (b) Voice data processing of the VoIP.
- 5. OVERVIEW OF SECURITY CONCERNS AND IMPACTS IN A VOIP SYSTEM
- 6. GENERIC SECURITY CONCERNS IN VOIP DOS- Availability. Eavesdropping – confidentiality. Alteration of voice stream – confidentiality and Integrity . Toll fraud – Integrity . Redirection of call – Integrity and confidentiality. Accounting Data Manipulation – Integrity and Confidentiality. Caller Identification Impersonation – Integrity
- 7. OCCURRENCE POSITION AND IMPACT OF POTENTIAL ATTACKS TO A VOIP SYSTEM
- 8. ATTACK VECTORS IN VOIP AND CRITICAL CHALLENGES The threats to the VOIP system can be further broken down into specific attack vectors to disrupt the system and summarized by the system layer where the attacks occur . SIP Registration Hijacking SIP Message Modification SIP cancel / bye attack Malformed SIP Command SIP Redirect RTP Payload RTP Tampering
- 9. SIP REGISTRATION HIJACKING Registration hijacking occurs when an attacker impersonates a valid UA to a registrar and replaces the legitimate registration with its own address . TLS can protect this. SIP MESSAGE MODIFICATION Have no Built in integrity ,by Man in middle attacks an attacker can intercept and modify SIP messages . TLS can protect from reading it.
- 11. SIP CANCEL /BYE ATTACK The attacker can create an SIP message with the Cancel or Bye command in its payload and send it to an end node to terminate ongoing conversation . Strong Authentication can control this attack. MALFORMED SIP COMMAND SIP uses HTML to carry command information , it becomes difficult to test the SIP parser with possible inputs. Strong Authentication and Dictionary test of cases for parser can save network.
- 13. SIP REDIRECT By attacking REDIRECT SERVER and commanding it to redirect the victim’s call to specific number can redirect to null type device . TLS with strong password can eliminate this. RTP PAYLOAD RTP carries actual encoded messages b/w two callers , adds sequencing information . MITM attack can gain access to the RTP media stream b/w two nodes and can inspect and modify the data
- 14. RTP TAMPERING By manipulation of the sequence number and timestamp fields in the header of the RTP packet , the packets can be re sequenced or made unusable. SRTP can determine the modification of packet.
- 15. POSITION AND IMPACT OF POTENTIALATTACKS IN VOIP
- 16. Other Attacks General to IP Data Networks. 1. Physical Attack 2. Address Resolution Protocol 3. MAC Spoofing 4. IP Spoofing 5. Malformed Packet 6. TCP or UDP Replay 7. Dynamic Host Configuration Protocol 8. Internet Control Message Protocol 9. Buffer Overflow Attack 10.OS Attack 11.Virus and Malware 12.CIDR Database Attack
- 19. DEFENSE VECTORS IN VOIP Separation of VOIP and Data Traffic Similar to port Authentication , separating voice and data traffic is a key enabler to overall security. VLAN technology (802.1q) is applied along with voice mail servers and SIP aware firewalls. Configuration Authentication VOIP phones need basic config. Information to get into VOIP system ,public key or shared secret keys can help in the authenticated configuration of the phone .Along with TLS it becomes more secure.
- 20. Signaling Authentication The IP Security(IP Sec ) protocol provides mechanisms for both authentication and encryption . Provides DNS Secure , Authentication Header protocol . Controls Replay Attacks. Media Encryption SRTP protocol minimizes the number of keys that must be shared b/w two nodes , MIKEY(multimedia Keying Protocol) capable of handing keys in adhoc environment .
- 21. SECURITY MECHANISMS AGAINST ATTACKS
- 22. SEGMENTATION OF VOIP VOICE AND DATA
- 23. Queries ??
- 24. THANK you