General information about OpenID

Message Sequence Chart

Specification

official specs at ​http://openid.net/developers/specs/

​OpenID Authentication 2.0

• ​Yadis (​Yadis 1.0)
• ​rfc1750 Randomness Recommendations for Security
• ​rfc2104 HMAC: Keyed-Hashing for Message Authentication
• ​rfc2631 Diffie-Hellman Key Agreement Method
• ​rfc3275 (Extensible Markup Language) XML-Signature Syntax and Processing
• ​rfc3339 Date and Time on the Internet: Timestamps
• ​rfc3986 section 6 URI Generic Syntax; 6. Normalization and Comparison
• ​Extensible Resource Identifier (XRI) Resolution V2.0 - Committee Draft 02
• ​Extensible Resource Identifier (XRI) Syntax V2.0

​OpenID Authentication 1.1

Extensions

• ​OpenID Attribute Exchange 1.0
• ​OpenID Simple Registration Extension 1.0