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how long does it take to crack a salted sha1 password based on the hash alone
assume the salt and password are comprised of 62 characters: a-zA-Z0-9
assume a 40 char salt
so the hashed string for a 6 letter password is 46 chars
62^46 = 2*10^82 permutations
at 700,000,000 passwords tried per second, you'd need 4*10^73 seconds to try all permutations
that's 1*10^66 years.

jperras commented Sep 13, 2011

Newer GPU-based methods can do ~2,300,000,000 SHA1 checks per second. http://www.golubev.com/hashgpu.htm

Still good enough, of course ;-).

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