Match List - I with List - II : List-I List-II (A) Monoalphabetic Cipher (I)…
2023
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 mechanismChoose the correct answer from the options given below: |
- A.
(A)-(III),(B)-(I),(C)-(IV),(D)-(II)
- B.
(A)-(III),(B)-(IV),(C)-(II),(D)-(I)
- C.
(A)-(I),(B)-(III),(C)-(IV),(D)-(II)
- D.
(A)-(II),(B)-(I),(C)-(IV),(D)-(III)
Attempted by 184 students.
Show answer & explanation
Correct answer: A
Answer: Monoalphabetic cipher → One-to-one relationship; DES → Round key; Stream cipher → Feedback mechanism; Polyalphabetic cipher → One-to-many relationship.
Monoalphabetic cipher: Each plaintext symbol is replaced by a single fixed ciphertext symbol (a fixed substitution), so there is a one-to-one relationship between plaintext and ciphertext symbols.
Polyalphabetic cipher: The same plaintext symbol can map to different ciphertext symbols depending on position or key, so it exhibits a one-to-many relationship.
Stream cipher: Keystream generators (often using linear feedback shift registers or similar structures) use feedback mechanisms to produce the keystream, so this corresponds to a feedback mechanism.
DES: A block cipher that applies multiple rounds using round keys derived from the main key, so it is associated with the concept of a round key.
Therefore the correct matching is: Monoalphabetic → One-to-one; DES → Round key; Stream cipher → Feedback mechanism; Polyalphabetic → One-to-many.