chosen-ciphertext attack
noun1
Computing, Cryptography, Engineering, Mathematics, Natural sciences, Physical sciences, Sciences An attack on a cryptosystem that relies on the attacker's ability to choose any ciphertext of their liking and decrypt it into the corresponding plaintext with that system and key. More powerful than a chosen-plaintext attack.
- The ElGamal encryption system is resistant against chosen-plaintext attacks, but not against chosen-ciphertext attacks.
- Synonyms
- CCA
- Coordinate terms
- ciphertext-only attack, known-plaintext attack, chosen-plaintext attack