In a known plaintext attack, the cryptanalyst has knowledge of which of the following?

The correct answer is C. both the plaintext and the associated ciphertext of several messages. In a known plaintext attack, the attacker has the plaintext and ciphertext of one or more messages. The goal is to discover the key used to encrypt the messages so that other messages can be deciphered and read.

Submitted by ahmad_uae· Apr 18, 2026Cryptography

Question

In a known plaintext attack, the cryptanalyst has knowledge of which of the following?

Options

Athe ciphertext and the key
Bthe plaintext and the secret key
Cboth the plaintext and the associated ciphertext of several messages
Dthe plaintext and the algorithm

How the community answered

(27 responses)

A
4% (1)
C
89% (24)
D
7% (2)

Explanation

In a known plaintext attack, the attacker has the plaintext and ciphertext of one or more messages. The goal is to discover the key used to encrypt the messages so that other messages can be deciphered and read.

Topics

#Known Plaintext Attack#Cryptanalysis#Cryptography Attacks

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