Chosen-plaintext attacks

Chosen-plaintext attack

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

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This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.

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Related pages

ElGamal encryption | Gardening (cryptanalysis) | Caesar cipher | Exclusive or | Encryption | One-time pad | Oracle machine | Cryptanalysis | Attack model | Ciphertext | Known-plaintext attack | Chosen-ciphertext attack | Malleability (cryptography) | Enigma machine | Symmetric-key algorithm | Plaintext | Adaptive algorithm | Adversary (cryptography) | Negligible function | Bitwise operation