I-D ACTION:draft-funk-tls-inner-application-extension-02.txt

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A New Internet-Draft is available from the on-line Internet-Drafts directories.


	Title		: TLS Inner Application Extension (TLS/IA)
	Author(s)	: P. Funk, et al.
	Filename	: draft-funk-tls-inner-application-extension-02.txt
	Pages		: 32
	Date		: 2006-3-7
	
This document defines a new TLS extension called "Inner 
Application". When TLS is used with the Inner Application extension 
(TLS/IA), additional messages are exchanged after completion of the 
TLS handshake, in effect providing an extended handshake prior to 
the start of upper layer data communications. Each TLS/IA message 
contains an encrypted sequence of Attribute-Value-Pairs (AVPs) from 
the RADIUS/Diameter namespace. Hence, the AVPs defined in RADIUS and 
Diameter have the same meaning in TLS/AI; that is, each attribute 
code point refers to the same logical attribute in any of these 
protocols. Arbitrary "applications" may be implemented using the AVP 
exchange. Possible applications include EAP or other forms of user 
authentication, client integrity checking, provisioning of 
additional tunnels, and the like. Use of the RADIUS/Diameter 
namespace provides natural compatibility between TLS/IA applications 
and widely deployed AAA infrastructures. 

It is anticipated that TLS/IA will be used with and without 
subsequent protected data communication within the tunnel 
established by the handshake. For example, TLS/IA may be used to 
secure an HTTP data connection, allowing more robust password-based 
user authentication to occur than would otherwise be possible using 
mechanisms available in HTTP. TLS/IA may also be used for its 
handshake portion alone; for example, EAP-TTLSv1 encapsulates a 
TLS/IA handshake in EAP as a means to mutually authenticate a client 
and server and establish keys for a separate data connection.

A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-funk-tls-inner-application-extension-02.txt

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