CS8792 CRYPTOGRAPHY AND NETWORK SECURITY L T P C 3 0 0 3
OBJECTIVES:
To understand Cryptography Theories, Algorithms and Systems.
To understand necessary Approaches and Techniques to build protection mechanisms in order to secure computer networks.
UNIT I INTRODUCTION 9
Security trends – Legal, Ethical and Professional Aspects of Security, Need for Security at Multiple levels, Security Policies – Model of network security – Security attacks, services and mechanisms – OSI security architecture – Classical encryption techniques: substitution techniques, transposition techniques, steganography- Foundations of modern cryptography: perfect security – information theory – product cryptosystem – cryptanalysis.
UNIT II SYMMETRIC KEY CRYPTOGRAPHY 9
MATHEMATICS OF SYMMETRIC KEY CRYPTOGRAPHY: Algebraic structures – Modular arithmetic-Euclid‟s algorithm- Congruence and matrices – Groups, Rings, Fields- Finite fields- SYMMETRIC KEY CIPHERS: SDES – Block cipher Principles of DES – Strength of DES – Differential and linear cryptanalysis – Block cipher design principles – Block cipher mode of operation – Evaluation criteria for AES – Advanced Encryption Standard – RC4 – Key distribution.
UNIT III PUBLIC KEY CRYPTOGRAPHY 9
MATHEMATICS OF ASYMMETRIC KEY CRYPTOGRAPHY: Primes – Primality Testing – Factorization – Euler’s totient function, Fermat’s and Euler’s Theorem – Chinese Remainder Theorem – Exponentiation and logarithm – ASYMMETRIC KEY CIPHERS: RSA cryptosystem – Key distribution – Key management – Diffie Hellman key exchange – ElGamal cryptosystem – Elliptic curve arithmetic-Elliptic curve cryptography.
UNIT IV MESSAGE AUTHENTICATION AND INTEGRITY 9
Authentication requirement – Authentication function – MAC – Hash function – Security of hash function and MAC – SHA –Digital signature and authentication protocols – DSS- Entity Authentication: Biometrics, Passwords, Challenge Response protocols- Authentication applications – Kerberos, X.509
UNIT V SECURITY PRACTICE AND SYSTEM SECURITY 9
Electronic Mail security – PGP, S/MIME – IP security – Web Security – SYSTEM SECURITY: Intruders – Malicious software – viruses – Firewalls.
TOTAL 45 PERIODS
OUTCOMES:
At the end of the course, the student should be able to:
Understand the fundamentals of networks security, security architecture, threats and vulnerabilities
Apply the different cryptographic operations of symmetric cryptographic algorithms
Apply the different cryptographic operations of public key cryptography
Apply the various Authentication schemes to simulate different applications.
Understand various Security practices and System security standards
TEXT BOOK:
1. William Stallings, Cryptography and Network Security: Principles and Practice, PHI
3rd Edition, 2006.
REFERENCES:
1. C K Shyamala, N Harini and Dr. T R Padmanabhan: Cryptography and Network
Security, Wiley India Pvt.Ltd
2. BehrouzA.Foruzan, Cryptography and Network Security, Tata McGraw Hill 2007.
3. Charlie Kaufman, Radia Perlman, and Mike Speciner, Network Security: PRIVATE Communication in a PUBLIC World, Prentice Hall, ISBN 0-13-046019-2
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