Question: (a) Define cryptography. (b) What is confidentiality? (c) Distinguish between plaintext and ciphertext. (d) Which is transmitted across the network-the plaintext or the ciphertext? (e)

(a) Define cryptography.
(b) What is confidentiality?
(c) Distinguish between plaintext and ciphertext.
(d) Which is transmitted across the network-the plaintext or the ciphertext?
(e) What is a cipher?
(f) What is a key?
(g) What must be kept secret in encryption for confidentiality?
(h) What is a cryptanalyst?

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