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...-time pad, can be broken with enough computational effort by [[brute force attack]], but the amount of effort needed may be exponentially dependent on the ke ...ponding ciphertext (perhaps many times). Finally, in a [[chosen-ciphertext attack]], the cryptanalyst may ''choose'' ciphertexts and learn their correspondin ...

...ly successful attacks against AES implementations have been [[side channel attack]]s. The National Security Agency (NSA) reviewed all the AES finalists, incl The most common way to attack block ciphers is to try various attacks on versions of the cipher with a re ...

...ude all possible additional bits, thereby increasing the difficulty of the attack.<br> ...