twoauth


The idea behind twoauth is to suppliment user logins with a two-phase challenge using a second authentication class in addition to their regular credentials.

Here is an example of a normal ssh session using twoauth authentication:
host1 ~ $ ssh host2
user@host2's password: 
Last login: Sat Oct 15 15:47:09 2011 from host1
OpenBSD 4.9 (GENERIC) #477: Wed Mar  2 06:50:31 MST 2011

Welcome to OpenBSD: The proactively secure Unix-like operating system.

ENTERING TWOAUTH AUTHENTICATION PHASE
Password:
host2 ~ $ 
This utility was designed for OpenBSD. For more information, view the README file which is included in the source distributions.

Releases: