[TLS] I-D Action: draft-ietf-tls-session-hash-05.txt
internet-drafts@ietf.org Thu, 16 April 2015 22:54 UTC
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Date: Thu, 16 Apr 2015 15:54:31 -0700
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Subject: [TLS] I-D Action: draft-ietf-tls-session-hash-05.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Transport Layer Security Working Group of the IETF. Title : Transport Layer Security (TLS) Session Hash and Extended Master Secret Extension Authors : Karthikeyan Bhargavan Antoine Delignat-Lavaud Alfredo Pironti Adam Langley Marsh Ray Filename : draft-ietf-tls-session-hash-05.txt Pages : 14 Date : 2015-04-16 Abstract: The Transport Layer Security (TLS) master secret is not cryptographically bound to important session parameters such as the server certificate. Consequently, it is possible for an active attacker to set up two sessions, one with a client and another with a server, such that the master secrets on the two sessions are the same. Thereafter, any mechanism that relies on the master secret for authentication, including session resumption, becomes vulnerable to a man-in-the-middle attack, where the attacker can simply forward messages back and forth between the client and server. This specification defines a TLS extension that contextually binds the master secret to a log of the full handshake that computes it, thus preventing such attacks. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-tls-session-hash/ There's also a htmlized version available at: http://tools.ietf.org/html/draft-ietf-tls-session-hash-05 A diff from the previous version is available at: http://www.ietf.org/rfcdiff?url2=draft-ietf-tls-session-hash-05 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/
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