Dictionary.net

A method of breaking a cipher (that is, todecrypt a specific encrypted text) by trying every possiblekey. The quicker the brute force attack, the weaker thecipher. Feasibility of brute force attack depends on the keylength of the cipher, and on the amount of computational poweravailable to the attacker. Brute force attack is impossibleagainst the ciphers with variable-size key, such as aone-time pad cipher.Breaking ciphers with many workstations(http://distributed.net/projects.html.en).