An Encoding Parameter for HTTP Basic Authentication

Document Type Replaced Internet-Draft (httpauth WG)
Last updated 2013-06-10 (latest revision 2013-05-08)
Replaced by draft-ietf-httpauth-basicauth-enc, draft-ietf-httpauth-basicauth-update
Stream IETF
Intended RFC status (None)
Expired & archived
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Stream WG state Adopted by a WG
Document shepherd No shepherd assigned
IESG IESG state Replaced by draft-ietf-httpauth-basicauth-enc, draft-ietf-httpauth-basicauth-update
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The "Basic" authentication scheme defined in RFC 2617 does not properly define how to treat non-ASCII characters. This has lead to a situation where user agent implementations disagree, and servers make different assumptions based on the locales they are running in. There is little interoperability for the non-ASCII characters in the ISO-8859-1 character set, and even less interoperability for any characters beyond that. This document defines a backwards-compatible extension to "Basic", specifying the server's character encoding expectation, using a new authentication scheme parameter.


Julian Reschke (

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