RFC1760: The S/KEY One-Time Password System
Network Working Group N. Haller Request for Comments: 1760 Bellcore Category: Informational February 1995 The S/KEY One-Time Password System Status of this Mem...
RFC4226: HOTP: An HMAC-Based One-Time Password Algorithm
Network Working Group D. M'Raihi Request for Comments: 4226 VeriSign Category: Informational M. Bellare UCSD ...
RFC6560: One-Time Password (OTP) Pre-Authentication
Internet Engineering Task Force (IETF) G. Richards Request for Comments: 6560 RSA, The Security Division of EMC Category: Standards Track April 2012 ISSN: 2070-1721 One-Time Password (OTP) Pre-Authentication...