19 lines
914 B
Text
19 lines
914 B
Text
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Eksblowfish is a variant of the Blowfish cipher, modified to make the
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key setup very expensive. ("Eks" stands for "expensive key
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schedule".) This doesn't make it significantly cryptographically
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stronger, but is intended to hinder brute-force attacks. It also
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makes it unsuitable for any application requiring key agility. It was
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designed by Niels Provos and David Mazieres for password hashing in
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OpenBSD.
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Eksblowfish is a parameterised (family-keyed) cipher. It takes a cost
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parameter that controls how expensive the key scheduling is. It also
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takes a family key, known as the "salt". Cost and salt parameters
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together define a cipher family. Within each family, a key determines
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an encryption function in the usual way.
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This distribution also includes an implementation of "bcrypt", the
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Unix crypt() password hashing algorithm based on Eksblowfish.
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WWW: http://search.cpan.org/dist/Crypt-Eksblowfish/
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