Which of the following statements is/are true? (i) In a secret-key…
2022
Which of the following statements is/are true?
(i) In a secret-key encryption/decryption technique, the same key is used by both parties.
(ii) In a secret-key encryption/decryption technique, the decryption algorithm is the inverse of the encryption algorithm.
- A.
Only (i)
- B.
Only (ii)
- C.
Both (i) and (ii)
- D.
Neither (i) nor (ii)
Attempted by 232 students.
Show answer & explanation
Correct answer: C
In secret-key (symmetric-key) cryptography, the sender and receiver share the same secret key. The encryption algorithm transforms plaintext into ciphertext, and the decryption algorithm applies the inverse of that transformation, using the same key, to recover the original plaintext.
So statement (i) is true (one shared key for both parties) and statement (ii) is true (decryption inverts encryption). Both statements are therefore correct.