About a year ago I stumbled upon the Over The Wire hacker challenges and started solving the first set of levels (called vortex). Since the...

Vortex level 5 consists in cracking a password hashed with MD5, which is called a preimage attack . No salt was used when applying the hash ...

Passwords are still the only mean of authentication for I'd say 99.95% of all online services including social networking sites, online ...