The ``Honeywords Project'' is based on the paper
``Honeywords: Making Password-Cracking Detectable,''
by Ari Juels and Ronald L. Rivest
(version 2.0, 5/2/13).
Summary: We suggest a simple method for improving the security
of hashed passwords: the maintenance of additional honeywords
(false passwords) associated with each user's account. An adversary
who steals a file of hashed passwords and inverts the hash function
cannot tell if he has found the password or a honeyword. The attempted
use of a honeyword for login sets off an alarm. An auxiliary server
(the honeychecker) can distinguish the user password from
honeywords for the login routine, and will set off an alarm if a
honeyword is submitted.
The paper: