Ldapwiki: FIDO

Overview[1]#

FIDO is Fast IDentity Online, and the Mission of the FIDO Alliance

is to change the nature of online authentication by:

Developing technical specifications that define an open, scalable, interoperable set of mechanisms that reduce the reliance on passwords to authenticate users.
Operating industry programs to help ensure successful worldwide adoption of the Specifications.
Submitting mature technical Specification(s) to recognized standards development organization(s) for formal standardization.

FIDO messages outside of the local device are done via REST.

user must first access a FIDO Relying Party Application or website and complete a Credential Enrollment process before using FIDO
User is prompted to choose an available FIDO Authenticator that matches the FIDO Relying Party’s acceptance policy.
User unlocks the FIDO Authenticator (Typically a type of Presence test), a button on a FIDO Authenticator, securely–entered PIN or other method.
the FIDO Authenticator creates a new Public Key/Private Key pair unique for the local device, FIDO Relying Party and user’s account.
Public Key is sent to the FIDO Relying Party and associated with the user’s account.
The Private Key and any information about the local authentication method (such as biometric Templates) never leave the local device.

Upon a login attempt, FIDO Server creates a random challenge and sends it to the FIDO Client.
The biometrics and PIN are matched locally by the FIDO Authenticator against the biometrics enrolled for that user; they are never transmitted to the server.
The user is prompted again to enter his biometrics/PIN.
If the match attempt is successful:
- unlocks the Private Key from the FIDO Client keystore. The FIDO Client signs the challenge using the user’s Private Key and sends the Digital Signature to the FIDO Server.
- The FIDO Server verifies the Digital Signature using the Public Key received during Credential Enrollment, and the user is permitted to login.

There might be more information for this subject on one of the following:

[#1] - FIDO® Suite - based on information obtained 2017-04-04
[#2] - The latest versions of the FIDO Alliance specifications - based on information obtained 2018-06-02-