Chosen-plaintext attack

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "Chosen-plaintext attack" – news · newspapers · books · scholar · JSTOR (November 2015) (Learn how and when to remove this message)

A chosen-plaintext attack (CPA) is an attack model for cryptanalysis which presumes that the attacker can obtain the ciphertexts for arbitrary plaintexts.^[1] The goal of the attack is to gain information that reduces the security of the encryption scheme.^[2]

Modern ciphers aim to provide semantic security, also known as ciphertext indistinguishability under chosen-plaintext attack, and they are therefore, by design, generally immune to chosen-plaintext attacks if correctly implemented.