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Computing (FOLDOC) dictionary
brute force attack
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cryptography A method of breaking a cipher (that is, to
decrypt a specific encrypted text) by trying every possible
key. The quicker the brute force attack, the weaker the
cipher. Feasibility of brute force attack depends on the key
length of the cipher, and on the amount of computational power
available to the attacker. Brute force attack is impossible
against the ciphers with variable-size key, such as a
one-time pad cipher.