Differentiate block ciphers from stream ciphers and contrast symmetric from asymmetric cryptography. Illustrate with examples.

(1)

Differentiate block ciphers from stream ciphers and contrast symmetric from asymmetric cryptography. Illustrate with examples. (Maximum: Half a Page)

(2)

(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)

 

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