Where is the best place to store salts?
Salts have a very specific goal in helping to mitigate offline attacks
against a stored hash. In themselves, they are not sensitive (and have
no value if the matching hash is not also held), but are obviously
essential to reliability as they must be available to perform the
authentication checks.
My advice would be to store both the hash and the salt together in the
same table; any database overhead will not be noticed as access should
be accomplished in a single transaction still (SELECT salt,hash FROM
table;).
Martin...
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