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Status: Verified (1)

RFC 5281, "Extensible Authentication Protocol Tunneled Transport Layer Security Authenticated Protocol Version 0 (EAP-TTLSv0)", August 2008

Note: This RFC has been updated by RFC 8996, RFC 9427

Source of RFC: IETF - NON WORKING GROUP
Area Assignment: sec

Errata ID: 1494
Status: Verified
Type: Technical
Publication Format(s) : TEXT
Reported By: Alfred Hoenes
Date Reported: 2008-08-22
Verifier Name: Sean Turner
Date Verified: 2011-03-09

Section 8, pg.19 says: 

      Keying Material = PRF-128(SecurityParameters.master_secret, "ttls
                keying material", SecurityParameters.client_random +
                SecurityParameters.server_random)

It should say:

      Keying Material = PRF-128(SecurityParameters.master_secret,
                "ttls keying material", SecurityParameters.client_random
                + SecurityParameters.server_random)

Notes:

The string in double quotes is a cryptographically significant
protocol element and hence white space within it should be
represented faithfully and unambiguously in the published text.
The line break and additional indentation inserted into the string
during final editing of the RFC disturb the clarity of the text.

This same issue already has been discussed at length in the context
of other documents making use of the same or similar key material
derivation techniques.

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