the default number of rounds is 5000. Increasing this number adds to the time it would take to brute-force or find a collision, while adding very little time to user login time. The chance of finding a collision is very low but this is an easy step to reduce it even more.
password [success=1 default=ignore] pam_unix.so obscure try_first_pass sha512 rounds=200000
the default number of rounds is 5000. Increasing this number adds to the time it would take to brute-force or find a collision, while adding very little time to user login time. The chance of finding a collision is very low but this is an easy step to reduce it even more.