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


Choose the correct answer from the options given below :

This question was previously asked in
UGC NET Computer Science (Paper 2) 07 Dec 2023 Official Paper
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  1. A - III, B - I, C - IV, D - II
  2. A - III, B - IV, C - II, D - I
  3. A - I, B - III, C - IV, D - II
  4. A - II, B - I, C - IV, D - III

Answer (Detailed Solution Below)

Option 1 : A - III, B - I, C - IV, D - II
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UGC NET Paper 1: Held on 21st August 2024 Shift 1
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Detailed Solution

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The correct answer is A - III, B - I, C - IV, D - II

EXPLANATION:

  • A. Monoalphabetic Cipher - III. One-to-one relationship
    • Monoalphabetic ciphers involve a one-to-one mapping of each plaintext letter to a corresponding ciphertext letter.
  • B. DES (Data Encryption Standard) - I. Round key
    • DES uses round keys in its encryption and decryption process.
  • C. Stream Cipher - IV. Feedback mechanism
    • Stream ciphers often use a feedback mechanism to generate a stream of key bits.
  • D. Polyalphabetic Cipher - II. One-to-many relationship
    • Polyalphabetic ciphers involve a one-to-many relationship between plaintext and ciphertext, as each plaintext letter can be encrypted to multiple ciphertext letters depending on the key.

So, the correct match is:A - III, B - I, C - IV, D - II

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