Fundamentals of Cryptography (CY-302) - Important Questions

Compare symmetric-key (secret key) cryptography and asymmetric-key (public key) cryptography.

Define cryptography and explain symmetric-key encryption technique with diagram.

Define perfect secrecy and discuss its characterizations and limitations.

What is perfect secrecy in a cryptosystem? Explain, with reference to one-time pad encryption.

Explain block ciphers and discuss the modes of operation of block ciphers with examples.

Explain CPA-secure ciphers constructed from PRFs.

Explain the DES and AES algorithms and highlight their features.

Discuss Message Authentication Codes and cryptographic hash functions.

Discuss birthday attacks and applications of cryptographic hash functions.

Explain the random oracle model and authenticated encryption.

Explain the Diffie-Hellman Key Exchange algorithm with a suitable example and cyclic groups.

Explain the discrete logarithm problem and its importance / uses in cryptography.

Explain the RSA algorithm and perform encryption and decryption using RSA algorithm for p = 7, q = 17, e = 5 and M = 11.

What is a digital signature and explain the Digital Signature Standard.

Explain CCA-secure public-key hybrid encryption schemes.

Discuss digital signatures, TLS/SSL and interactive protocols.