Download Specifications

Update December 7th, 2016: FIDO Alliance has announced the availability of the UAF 1.1 and U2F 1.1 specifications, which are available below. Older versions of the specifications can be found in the specification archive along with the Chinese translation of the UAF 1.0 specifications. The FIDO Specification Status and Intellectual Property Rights (IPR) of the FIDO Alliance specifications can be found here.


The FIDO Alliances publishes the following technical specifications for any implementer to download. In addition, the Alliance is providing support for implementers of FIDO authentication technology by operating the  fido-dev@fidoalliance.org public discussion list. Please post any questions you may have about implementing the FIDO specifications in that forum.

The FIDO Alliance produces PDF-formatted specifications as a convenience for readers, however readers are advised to refer to the HTML-formatted specs if they encounter any formatting issues with the PDF-formatted specs.

IF YOU ARE NOT YET A MEMBER OF THE FIDO ALLIANCE, AND YOU WOULD LIKE TO COMMENT ON OUR PUBLIC DRAFT SPECIFICATIONS, PLEASE USE THE CONTACT US FORM.

 

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U2F v1.1 Specifications

UAF v1.1 Specifications

FIDO 2.0 Specifications

PLEASE NOTE that the FIDO 2.0 Specifications were submitted to the W3C on November 12, 2015 for formal standardization. These are provided here for historic reference only. Implementers are encouraged to work with the W3C specifications.

About FIDO Specification Status and Intellectual Property Rights (IPR)

Summary of IPR Status of the Specifications on this site:

Specification Specification Status
U2F 1.0 Proposed Standard Expanded to the World
U2F 1.1 Implementation Draft
UAF 1.0 Proposed Standard Expanded to the World
UAF 1.1 Review Draft
FIDO 2.0 Submission to W3C Proposed Standard Expanded to the World

Explanation of IPR Status

FIDO Alliance specifications progress through various stages, Pre-Draft, Working Draft, Review Draft, Implementation Draft, Proposed Standard and Proposed Standard Expanded to the World.  The Promise, the covenant FIDO Alliance Member organizations make not to assert their patent rights against other compliant implementations, is applied differently based on the specification stage.  The Promise does not apply for Pre-Draft, Working Draft and Review Draft specification stages.  At Implementation Draft stage, the Promise is provided by FIDO Alliance Working Group members to other FIDO Alliance Working Group members.  At Proposed Standard stage, the Promise is provided by all FIDO Alliance members to all other FIDO Alliance members.  At Proposed Standard Expanded to the World stage, the Promise is provided by all FIDO Alliance members to any party in the world.  It is understood that the above is a brief summary and that the actual terms are provided in the FIDO Alliance Membership Agreement, which should be consulted for any specific case.

Patent Notices

The FIDO Alliance Membership Agreement provides Members the opportunity to make withdrawals of Granted Claims from the Promise under certain conditions.  The FIDO Alliance Membership Agreement should be consulted for the specific conditions.  The Board is pleased to report to the public that it has received no such notice pertaining to any of the Specifications published on this site.  Implementers interested in learning more about what this means are encouraged to review our IPR Summary and/or section 6 of the FIDO Alliance Membership Agreement.