> On April 29, 2017 at 4:22 AM David Mehler <dave.meh...@gmail.com> wrote: > > > Hello, > > I have a few questions on password schemes. Is SHA512 the most secure? > Is there a difference between SHA512 and SHA512-CRYPT? What about > SSHA512 and SSH512-CRYPT? > > Is there a problem with this sql statement: > > UPDATE virtual_users SET password=CONCAT(‘{SHA256-CRYPT}’, ENCRYPT > (‘Password Goes Here’, CONCAT(‘$5$’, SUBSTRING(SHA(RAND()), -16)))) > WHERE user=’u...@example.com’; > > I'm getting an error 1064 at the ending email address. > > Thanks. > Dave.
SSHA512 is salted SHA512, SHA512-CRYPT is crypt(3) compatible salted hash. PCKS5 or SHA512-CRYPT with over 1000 rounds is probably very secure, but SHA512-CRYPT is also good. Using SHA512 is not recommended, as it's unsalted hash. If ENCRYPT is same as crypt(3) then you can try put rounds into salt, like "$6$rounds=4000$s9Zc4OA11IuLt/iV$". Aki