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Cryptography

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4
  • $\begingroup$ Passwords are randomly distributed and attacker can be very efficient and has a security know how. $\endgroup$ Commented Jul 10, 2016 at 19:56
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    $\begingroup$ With 10k iterations, it would take roughly 180k GPU-days (with GTX 1070s) to get through the entire search space. Dedicated circuits will be faster. An attacker has to do this only about once, as he can build a rainbow table for your application then. $\endgroup$ Commented Jul 10, 2016 at 19:56
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    $\begingroup$ How many users? When you lack unique salts, the more passwords exist, the easier it is to crack some. $\endgroup$ Commented Jul 10, 2016 at 20:05
  • $\begingroup$ May be 100 tousand $\endgroup$ Commented Jul 10, 2016 at 20:10