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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