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UNIT- I: Basic Principles
Security Goals, Cryptographic Attacks, Services and Mechanisms, Mathematics of Cryptography
UNIT -II: Symmetric Encryption
Mathematics of Symmetric Key Cryptography, Introduction to Modern Symmetric Key Ciphers,
Data Encryption Standard, Advanced Encryption Standard.
UNIT- III: Asymmetric Encryption
Mathematics of Asymmetric Key Cryptography, Asymmetric Key Cryptography
UNIT -IV: Data Integrity, Digital Signature Schemes & Key Management
Message Integrity and Message Authentication, Cryptographic Hash Functions, Digital
Signature, Key Management.
UNIT-V: Network Security-I
Security at application layer: PGP and S/MIME, Security at the Transport Layer: SSL and TLS
UNIT- VI: Network Security-II
Security at the Network Layer: IPSec, System Security
IV Year – I Semester
1) Cryptography and Network Security, Behrouz A Forouzan, Debdeep Mukhopadhyay,
(3e) Mc Graw Hill.
2) Cryptography and Network Security, William Stallings, (6e) Pearson.
3) Everyday Cryptography, Keith M.Martin, Oxford.
1) Network Security and Cryptography, Bernard Meneges, Cengage Learning.
Construct a Playfair matrix with the key largest. encrypt this message: MEET
ME AT THE TOGA PARTY
 b) List and explain the security mechanisms defined by X.800.  3. Write about the following in AES cipher:
Substitute Bytes Transformation
AddRound Key Transformation  4. Write about key generation, encryption and decryption in ElGamal
Cryptosystem.  5. a) Give the structure of CMAC. What is the difference between CMAC and
 b) Describe the attacks on digital signatures.  6. a) In S/MIME, how does a receiver find out what cryptographic algorithms the
sender has used when receives an S/MIME message.
 b) Explain about the trust mechanism and certificates used by PGP and S/MIME.  7. a) Write short notes on Signature based IDS.  b) What are the basic approaches of building Security Associations?