|| FreeBSD File Formats Manual
/etc/opiekeys - OPIE database of user key information
file contains user information used by the OPIE software to authenticate users. The
file is backwards compatible with the S/Key
database file, but only if the hashing algorithm (MD4 and MD5) is the same between S/Key and OPIE (i.e., MD5 OPIE cannot use MD4 S/Key keys). The
file consists of six fields separated by spaces (tabs are properly interpreted, but spaces should be used instead) as follows:
name User's login name.
sequence User's sequence number.
seed User's seed.
key User's last response (hex).
date Last change date.
time Last change time.
Bellcore's S/Key was written by Phil Karn, Neil M. Haller, and John S. Walden of Bellcore. OPIE was created at NRL by Randall Atkinson, Dan McDonald, and Craig Metz.
S/Key is a trademark of Bell Communications Research (Bellcore).
OPIE is discussed on the Bellcore "S/Key Users" mailing list. To join, send an email request to: