This document provides an overview of network security for a course, including discussing cryptography algorithms and protocols, network security applications and tools, system security issues, and standards for internet security. The course will cover topics such as encryption, digital signatures, key exchange, and network security protocols and applications. Students will complete homework assignments, projects implementing cryptography and a secure messaging system, and exams.
Short Presentation (2 Hrs) on SSL and TLS Protocol and its reference standard. Good for intermediate participant or technical who want to understand secure protocol an
Short Presentation (2 Hrs) on SSL and TLS Protocol and its reference standard. Good for intermediate participant or technical who want to understand secure protocol an
Key management: Introduction, How public key distribution done, Diffie Hellman Key Exchage Algorithm,Digital Certificate. Key Management using Digital certificate is done etc. wireshark screenshot showing digital cetificate.
this presentation is on block cipher modes which are used for encryption and decryption to any message.That are Defined by the National Institute of Standards and Technology . Block cipher modes of operation are part of symmetric key encryption algorithm.
i hope you may like this.
Transport Layer Security (TLS) is a protocol that ensures privacy between communicating applications and their users on the Internet. When a server and client communicate, TLS ensures that no third party may eavesdrop or tamper with any message. TLS is the successor to the Secure Sockets Layer (SSL).
Security Concepts: Introduction, The need for security, Security approaches, Principles of security, Types of Security attacks, Security services, Security Mechanisms, A model for Network Security Cryptography Concepts and Techniques: Introduction, plain text and cipher text, substitution techniques, transposition techniques, encryption and decryption, symmetric and asymmetric key cryptography, steganography, key range and key size, possible types of attacks
Key management: Introduction, How public key distribution done, Diffie Hellman Key Exchage Algorithm,Digital Certificate. Key Management using Digital certificate is done etc. wireshark screenshot showing digital cetificate.
this presentation is on block cipher modes which are used for encryption and decryption to any message.That are Defined by the National Institute of Standards and Technology . Block cipher modes of operation are part of symmetric key encryption algorithm.
i hope you may like this.
Transport Layer Security (TLS) is a protocol that ensures privacy between communicating applications and their users on the Internet. When a server and client communicate, TLS ensures that no third party may eavesdrop or tamper with any message. TLS is the successor to the Secure Sockets Layer (SSL).
Security Concepts: Introduction, The need for security, Security approaches, Principles of security, Types of Security attacks, Security services, Security Mechanisms, A model for Network Security Cryptography Concepts and Techniques: Introduction, plain text and cipher text, substitution techniques, transposition techniques, encryption and decryption, symmetric and asymmetric key cryptography, steganography, key range and key size, possible types of attacks
CS8792 - Cryptography and Network Securityvishnukp34
this is an engineering subject.this consist of
pgno: 5 - Information security in past & present
pgno: 7 - Aim of Course
pgno: 8 - OSI Security Architecture
pgno: 9 - Security Goals – CIA Triad
pgno: 13 - Aspects of Security
pgno: 17 - ATTACKS
pgno: 22 - Passive Versus Active Attacks
pgno: 23 - SERVICES AND MECHANISMS
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For more information, visit-www.vavaclasses.com
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Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
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Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
We all have good and bad thoughts from time to time and situation to situation. We are bombarded daily with spiraling thoughts(both negative and positive) creating all-consuming feel , making us difficult to manage with associated suffering. Good thoughts are like our Mob Signal (Positive thought) amidst noise(negative thought) in the atmosphere. Negative thoughts like noise outweigh positive thoughts. These thoughts often create unwanted confusion, trouble, stress and frustration in our mind as well as chaos in our physical world. Negative thoughts are also known as “distorted thinking”.
1. 1
Network Security
Chase Q. Wu
New Jersey Institute of Technology
Oak Ridge National Laboratory
https://web.njit.edu/~chasewu
Email: chase.wu@njit.edu
wuqn@ornl.gov
3. 3
About This Course
Textbook:
1. Network Security Essentials: Applications and Standards,
3rd Ed. William Stallings
2. Cryptography and Network Security: Principles and
Practices, 4th Ed. William Stallings
Contents:
1. Cryptography
– Algorithms and protocols
– Conventional and public key-based encryption, hash func,
digital signatures, and key exchange
2. Network security applications
– Applications and tools
– Kerberos, X.509v3 certificates, PGP, S/MIME, IP
security, SSL/TLS, SET, and SNMPv3
3. System security
– System-level issues
– Intruders, viruses, worms, DOS
5. 5
Coursework Components
Homework:
– After each chapter
Projects:
– Cryptography (RSA implementation)
– A secure instant messenger system
Exams: Comprehensive in English
Do I have a TA to help with the class?
6. 6
Chapter 1 – Introduction
… teaches us to rely not on the likelihood of the
enemy's not coming, but on our own readiness
to receive him; not on the chance of his not
attacking, but rather on the fact that we have
made our position unassailable.
—The Art of War, Sun Tzu
故用兵之法,无恃其不来,恃吾有以待也;无
恃其不攻,恃吾有所不可攻也。
—《孙子兵法 · 九变篇》
7. 7
Outline
• Background
• Attacks, services and mechanisms
• Security attacks
• Security services
• Methods of Defense
• A model for Internetwork Security
• Internet standards and RFCs
8. 8
Background
• Information Security requirements have
changed in recent times
– Traditionally provided by physical and
administrative mechanisms
– Many daily activities have been shifted from
physical world to cyber space
• Use of computers
– Protect files and other stored information
• Use of networks and communications links
– Protect data during transmission
• The focus of many funding agencies in US
– DOD, NSF, DHS, etc.
– ONR: game theory for cyber security
9. 9
Definitions
• Computer Security
– Generic name for the collection of tools
designed to protect data and to thwart
hackers
• Network Security
– Measures to protect data during their
transmission
• Internet Security (our focus!)
– Measures to protect data during their
transmission over a collection of
interconnected networks
11. 11
OSI Security Architecture
• ITU-T X.800 “Security Architecture for
OSI”
– A systematic way of defining and providing
security requirements
– Provides a useful, if abstract, overview of
concepts we will study
ITU-T: International Telecommunication Union
Telecommunication Standardization Sector
OSI: Open Systems Interconnection
12. 12
3 Aspects of Info Security
• Security Attack
– Any action that compromises the security of
information.
• Security Mechanism
– A mechanism that is designed to detect, prevent, or
recover from a security attack.
• Security Service
– A service that enhances the security of data
processing systems and information transfers.
• Makes use of one or more security mechanisms.
13. 13
Security Attacks
• Threat & attack
– Often used equivalently
• There are a wide range of attacks
– Two generic types of attacks
• Passive
• Active
15. 15
Security Attacks
• Interruption: This is an attack on
availability
• Interception: This is an attack on
confidentiality
• Modification: This is an attack on
integrity
• Fabrication: This is an attack on
authenticity
16. 16
3 Primary Security Goals
Fundamental security objectives for both data and
information/computing services
18. 18
Security Services
X.800
– A service provided by a protocol layer of communicating open systems,
which ensures adequate security of the systems or of data transfers
• Confidentiality (privacy)
• Authentication (who created or sent the data)
• Integrity (has not been altered)
• Non-repudiation (the order is final)
• Access control (prevent misuse of resources)
• Availability (permanence, non-erasure)
– Denial of Service Attacks
– Virus that deletes files
19. 19
Security Mechanism
• Features designed to detect, prevent, or
recover from a security attack
• No single mechanism that will support all
services required
• One particular element underlies many of
the security mechanisms in use:
– Cryptographic techniques
– Hence we will focus on this topic first
22. 22
Model for Network Security
Using this model requires us to:
1. design a suitable algorithm for the security
transformation (message de/encryption)
2. generate the secret information (keys) used by
the algorithm
3. develop methods to distribute and share the
secret information (keys)
4. specify a protocol enabling the principals to
use the transformation and secret information
for a security service (e.g. ssh)
24. 24
Model for Network Access Security
Using this model requires us to implement:
1. Authentication
select appropriate gatekeeper functions to identify
users
2. Authorization
implement security controls to ensure only
authorized users access designated information or
resources
Trusted computer systems may be useful
to help implement this model
25. 25
Methods of Defense
• Encryption
• Software Controls
– Limit access in a database or in operating
systems
– Protect each user from other users
• Hardware Controls
– Smartcard (ICC, used for digital signature and
secure identification)
• Policies
– Frequent changes of passwords
– Recent study shows controversial arguments
• Physical Controls
26. 26
Internet standards and RFCs
• Three organizations in the Internet
society
– Internet Architecture Board (IAB)
• Defining overall Internet architecture
• Providing guidance to IETF
– Internet Engineering Task Force (IETF)
• Actual development of protocols and standards
– Internet Engineering Steering Group (IESG)
• Technical management of IETF activities and
Internet standards process