From: zindorsky on
On Jun 9, 3:49 am, Paul Johnston <paul....(a)gmail.com> wrote:
> As for brute forcing, I'm aware that all hashes are eventually brute
> forceable, especially with GPUs and rainbow tables.

If you use PBKDF2 correctly (that is, with salt of adequate size) then
rainbow tables are absolutely no threat. Salt's purpose, after all, is
exactly to counter those kind of attacks.