Question

The __________________ is similar to the chosen-plaintext attack, except the attacker can obtain ciphertexts encrypted under two different keys. (the keys need to be related, meaning that one was derived from the other as is the case in wireless systems)

A) Differential attack
B) Known-plaintext attack
C) Related-key attack
D) Meet-in-the-middle attack

Answer 1

The related-key attack is similar to the chosen-plaintext attack, but with ciphertexts encrypted under related keys. It allows attackers to gain insights into the encryption algorithm.

Step-by-step explanation:

The correct answer is C) Related-key attack. In a related-key attack, the attacker has access to ciphertexts encrypted under two different keys that are related. This means that one key was derived from the other, as is the case in some wireless systems. By analyzing the ciphertexts and the relationship between the keys, the attacker can gain insights into the encryption algorithm and potentially recover the plaintext.