Match List I with List II
| List I | List II |
|---|---|
| (a) Monoalphabetic cipher | (I) Round key |
| (b) DES | (II) One-to-many relationship |
| (c) Stream cipher | (III) One-to-one relationship |
| (d) Polyalphabetic cipher | (IV) Feedback mechanism |
Pick an option to check yourself, or open the answer below.
Show answer & explanation
Correct answer: A. (a)-(III), (b)-(I), (c)-(IV), (d)-(II)
Explanation
A monoalphabetic cipher has a one-to-one mapping (III). DES uses round keys (I). Stream ciphers (e.g. CFB/OFB modes) use a feedback mechanism (IV). A polyalphabetic cipher maps one plaintext letter to many ciphertext letters (II).More Data Communication and Computer Networks questions
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