1. Discuss the notion of keys in cryptography.
Is a block better than a stream?
Please note, maximum number of words – 150
Differentiate block ciphers from stream ciphers and contrast symmetric from asymmetric cryptography. Illustrate with examples. (Maximum: Half a Page)
(a) Compare monoalphabetic and polyalphabetic ciphers.
(b) Using the Caesar Cipher method, crack this coded message – decrypt the ciphertext – WXWRULDO.
Illustrate your work.
(Maximum: Half a Page)