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- Bcrypt abstract "bcrypt is a key derivation function for passwords designed by Niels Provos and David Mazières, based on the Blowfish cipher, and presented at USENIX in 1999. Besides incorporating a salt to protect against rainbow table attacks, bcrypt is an adaptive function: over time, the iteration count can be increased to make it slower, so it remains resistant to brute-force search attacks even with increasing computation power.Blowfish is notable among block ciphers for its expensive key setup phase. It starts off with subkeys in a standard state, then uses this state to perform a block encryption using part of the key, and uses the result of that encryption (which is more accurately a hashing) to replace some of the subkeys. Then it uses this modified state to encrypt another part of the key, and uses the result to replace more of the subkeys. It proceeds in this fashion, using a progressively modified state to hash the key and replace bits of state, until all subkeys have been set.Provos and Mazières took advantage of this, and took it further. They developed a new key setup algorithm for Blowfish, dubbing the resulting cipher "Eksblowfish" ("expensive key schedule Blowfish"). The key setup begins with a modified form of the standard Blowfish key setup, in which both the salt and password are used to set all subkeys. There are then a number of rounds in which the standard Blowfish keying algorithm is applied, using alternately the salt and the password as the key, each round starting with the subkey state from the previous round. Cryptotheoretically, this is no stronger than the standard Blowfish key schedule, but the number of rekeying rounds is configurable; this process can therefore be made arbitrarily slow, which helps deter brute-force attacks upon the hash or salt.The iteration count is a power of two, which is an input to the algorithm. The number is encoded in the textual result.There are implementations of bcrypt for Ruby, Python, C, C#, Perl, PHP, Java and other languages.".
- Bcrypt wikiPageExternalLink bcrypt-ruby.rubyforge.org.
- Bcrypt wikiPageExternalLink bcrypt.codeplex.com.
- Bcrypt wikiPageExternalLink bcrypt.sourceforge.net.
- Bcrypt wikiPageExternalLink javascript-bcrypt.
- Bcrypt wikiPageExternalLink py-bcrypt.
- Bcrypt wikiPageExternalLink crypt.
- Bcrypt wikiPageExternalLink function.password-hash.php.
- Bcrypt wikiPageExternalLink crypt_blowfish.php.
- Bcrypt wikiPageExternalLink downloads.html.
- Bcrypt wikiPageExternalLink bcrypt-in-objective-c.
- Bcrypt wikiPageExternalLink internat.adv.
- Bcrypt wikiPageExternalLink jBCrypt.
- Bcrypt wikiPageExternalLink phpass.
- Bcrypt wikiPageExternalLink software.php?page=cryptsharp.
- Bcrypt wikiPageExternalLink bcrypt.go?repo=crypto.
- Bcrypt wikiPageExternalLink dbcrypt.
- Bcrypt wikiPageExternalLink node.bcrypt.js.
- Bcrypt wikiPageExternalLink bcrypt.
- Bcrypt wikiPageExternalLink Crypt::Eksblowfish::Bcrypt.
- Bcrypt wikiPageID "21564294".
- Bcrypt wikiPageRevisionID "603450007".
- Bcrypt hasPhotoCollection Bcrypt.
- Bcrypt subject Category:Computer_access_control_protocols.
- Bcrypt subject Category:Cryptographic_software.
- Bcrypt subject Category:Cryptography.
- Bcrypt subject Category:Key_derivation_functions.
- Bcrypt comment "bcrypt is a key derivation function for passwords designed by Niels Provos and David Mazières, based on the Blowfish cipher, and presented at USENIX in 1999. Besides incorporating a salt to protect against rainbow table attacks, bcrypt is an adaptive function: over time, the iteration count can be increased to make it slower, so it remains resistant to brute-force search attacks even with increasing computation power.Blowfish is notable among block ciphers for its expensive key setup phase.".
- Bcrypt label "Bcrypt".
- Bcrypt label "Bcrypt".
- Bcrypt label "Bcrypt".
- Bcrypt label "Bcrypt".
- Bcrypt label "Bcrypt".
- Bcrypt label "Bcrypt".
- Bcrypt sameAs Bcrypt.
- Bcrypt sameAs Bcrypt.
- Bcrypt sameAs Bcrypt.
- Bcrypt sameAs m.05h57fl.
- Bcrypt sameAs Q286896.
- Bcrypt sameAs Q286896.
- Bcrypt wasDerivedFrom Bcrypt?oldid=603450007.
- Bcrypt isPrimaryTopicOf Bcrypt.