One Time Password (OTP) Technology

This page collects information on one-time password (OTP) technology. This technology allows authentication over the Internet without the secret password passing in plaintext.

S/Key ISOC Conference Paper.
draft-haller-otp-05.txt: the OTP IETF internet draft.
RFC 1760: the OTP RFC.
OPIE from the Navy Research Labs (NRL).
The Bellcore S/Key distribution and OTP archive.
Wietse Venema's Logdaemon package.
Java-based S/Key calculator.