An attacker may obtain duplicate texts, one in ciphertext and one in plaintext, which enable the individual to reverse-engineer the encryption algorithm in a ____ attack.
A) man-in-the-middle
B) timing
C) known-plaintext
D) selected-plaintext

Question

Quizplus · Accepted Answer

This type of attack is called a known-plaintext attack, where the attacker has access to both the ciphertext and plaintext of the same message. By analyzing the pairs of plaintext and ciphertext, the attacker may be able to deduce the encryption algorithm used.

An Attacker May Obtain Duplicate Texts, One in Ciphertext and One