In a ____ attack, the attacker has the ciphertext of several messages that were encrypted with the same encryption algorithm but has no access to the plaintext, so he or she must try to figure out the key used to encrypt the data.
A)chosen-ciphertext
B)chosen-plaintext
C)known plaintext
D)ciphertext-only

Question

Quizplus · Accepted Answer

The given scenario mentions that the attacker has access only to the ciphertext and no other information, hence this is a ciphertext-only attack.

In a ____ Attack, the Attacker Has the Ciphertext of Several