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 ...
RFC6238: TOTP: Time-Based One-Time Password Algorithm
Internet Engineering Task Force (IETF) D. M'Raihi Request for Comments: 6238 Verisign, Inc. Category: Informational S. Machani ISSN: 2070-1721 Diversinet Corp. ...
RFC6287: OCRA: OATH Challenge-Response Algorithm
Internet Engineering Task Force (IETF) D. M'Raihi Request for Comments: 6287 Verisign, Inc. Category: Informational J. Rydell ISSN: 2070-1721 Portwise, Inc. ...