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- Q869370 subject Q7210623.
- Q869370 abstract "In cryptography, a brute-force attack, or exhaustive key search, is a cryptanalytic attack that can, in theory, be used against any encrypted data (except for data encrypted in an information-theoretically secure manner). Such an attack might be used when it is not possible to take advantage of other weaknesses in an encryption system (if any exist) that would make the task easier. It consists of systematically checking all possible keys or passwords until the correct one is found. In the worst case, this would involve traversing the entire search space.When password guessing, this method is very fast when used to check all short passwords, but for longer passwords other methods such as the dictionary attack are used because of the time a brute-force search takes.When key guessing for modern crytosystems, the key length used in the cipher determines the practical feasibility of performing a brute-force attack, with longer keys exponentially more difficult to crack than shorter ones. A cipher with a key length of N bits can be broken in a worst-case time proportional to 2N and an average time of half that. In contrast, even though some historical encryption algorithms have large key space, often no need to apply brute force attack.Brute-force attacks can be made less effective by obfuscating the data to be encoded, something that makes it more difficult for an attacker to recognize when the code has been cracked. One of the measures of the strength of an encryption system is how long it would theoretically take an attacker to mount a successful brute-force attack against it.Brute-force attacks are an application of brute-force search, the general problem-solving technique of enumerating all candidates and checking each one.The term "brute-force" is not the only term to name such a type of attack. It can also be called "bruteforce", "brute force" and just "brute" (that is common in names of programs that perform brute-force attacks).".
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- Q869370 wikiPageExternalLink DES.
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- Q869370 comment "In cryptography, a brute-force attack, or exhaustive key search, is a cryptanalytic attack that can, in theory, be used against any encrypted data (except for data encrypted in an information-theoretically secure manner). Such an attack might be used when it is not possible to take advantage of other weaknesses in an encryption system (if any exist) that would make the task easier. It consists of systematically checking all possible keys or passwords until the correct one is found.".
- Q869370 label "Brute-force attack".
- Q869370 depiction Board300.jpg.