Late 1970s - Unix: salt & hash encoding syntax Unix /etc/passwd file excerpt (2.9BSD default, 1983 - but the same hash encoding is used since 7th Edition in late 1970s) wnj:ZDjXDBwXle2gc:8:2:Bill Joy,457E,7780:/a/guest/wnj:/bin/csh dmr:AiInt5qKdjmHs:9:2:Dennis Ritchie:/a/guest/dmr: ken:sq5UDrPlKj1nA:10:2:& Thompson:/a/guest/ken: mike:KnKNwMkyCt8ZI:11:2:mike karels:/a/guest/mike:/bin/csh carl:S2KiTfS3pH3kg:12:2:& Smith,508-21E,6258:/a/guest/carl:/bin/csh joshua::999:2:&:/usr/games:/usr/games/wargames The first two characters are the salt (12-bit), followed by 11 characters of the hash (64-bit) The WarGames movie came out in 1983, featuring war dialing and more. "Joshua" is a backdoor username in the movie.