Requirements for Web Authentication Resistant to Phishing

Document Type Expired Internet-Draft (individual in app area)
Author Sam Hartman 
Last updated 2015-10-14 (latest revision 2008-08-18)
Stream IETF
Intended RFC status Informational
Expired & archived
pdf htmlized (tools) htmlized bibtex
Stream WG state (None)
Document shepherd No shepherd assigned
IESG IESG state Expired (IESG: Dead)
Consensus Boilerplate Unknown
Telechat date
Responsible AD Lisa Dusseault
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This memo proposes requirements for protocols between web browsers and relying parties at websites; these requirements also impact third parties involved in the authentication process. These requirements minimize the likelihood that criminals will be able to gain the credentials necessary to impersonate a user or be able to fraudulently convince users to disclose personal information. To meet these requirements browsers must change. Websites must never receive information such as passwords that can be used to impersonate the user to third parties. Browsers should authenticate the website to the browser as part of authenticating the user to the website. Browsers MUST flag situations when this authentication fails and flag situations when the target website is not authorized to accept the identity being offered as this is a strong indication of fraud. These requirements may serve as a basis for requirements for preventing fraud in environments other than the web.


Sam Hartman (

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