Internet Engineering Task Force (IETF) A. Barth Request for Comments: 6265 U.C. Berkeley Obsoletes: 2965 April 2011 Category: Standards Track ISSN: 2070-1721 HTTP State Management Mechanism Abstract This document defines the HTTP Cookie and Set-Cookie header fields. These header fields can be used by HTTP servers to store state (called cookies) at HTTP user agents, letting the servers maintain a s