Skip to main content

The Public Suffix Structure file format and its use for Cookie domain validation

Document Type Expired Internet-Draft (individual)
Expired & archived
Author Yngve Pettersen
Last updated 2014-08-17 (Latest revision 2014-02-13)
RFC stream (None)
Intended RFC status (None)
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


This document defines the term "Public Suffix domain" as meaning a domain under which multiple parties that are unaffiliated with the owner of the Public Suffix domain may register subdomains. Examples of Public Suffix domains include "org", "", "" and "". It also defines a file format that can be used to distribute information about such Public Suffix domains to relying parties. As an example, this information is then used to limit which domains an Internet service can set HTTP cookies for, strengthening the rules already defined by the cookie specification. This specification updates RFC 6265 [RFC6265] by defining the term "Public Suffix domain".


Yngve Pettersen

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)