Description

Decrypt takes two integers, resulting from an ElGamal encryption, and returns the plaintext of the message. An error can result only if the ciphertext is invalid. Users should keep in mind that this is a padding oracle and thus, if exposed to an adaptive chosen ciphertext attack, can be used to break the cryptosystem. See “Chosen Ciphertext Attacks Against Protocols Based on the RSA Encryption Standard PKCS #1”, Daniel Bleichenbacher, Advances in Cryptology (Crypto '98),

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