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Salts won't give you that much greater security these days. Password-cracking GPGPU hardware is already well into the consumer domain. Using a pair of AMD's HD 5970, you can get cranking to just over 1bn SHA256 hashes/s.


Doesn't salting and iterative hashing pretty much stop rainbow tables? Didn't they find the passwords via a rainbow table?


Yes, they stop rainbow tables, but not GPGPU crunchers like the HD 5970. Moore's law is catching up rather fast at the moment.


You can still maximize the time and expense of an attack with salts and rainbow tables. (and bcrypt)




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