Addition of Kerberos Cipher Suites to Transport Layer Security (TLS) (RFC2712)
Original Publication Date: 1999-Oct-01
Included in the Prior Art Database: 2005-May-22
Internet Society Requests For Comment (RFCs)
A. Medvinsky: AUTHOR [+2]
This document proposes the addition of new cipher suites to the TLS protocol  to support Kerberos-based authentication. Kerberos credentials are used to achieve mutual authentication and to establish a master secret which is subsequently used to secure client-server communication.
Network Working Group A.
Request for Comments: 2712 Excite
Category: Standards Track M. Hur
Addition of Kerberos Cipher Suites to Transport Layer Security (TLS)
Status of this Memo
specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright (C) The Internet Society (1999). All Rights Reserved.
ciphersuites defined in this memo are included only for
the purpose of documenting the fact that those ciphersuite codes have
already been assigned. 40-bit ciphersuites were designed to comply
with US-centric, and now obsolete, export restrictions. They were
never secure, and nowadays are inadequate even for casual
applications. Implementation and use of the 40-bit ciphersuites
defined in this document, and elsewhere, is strongly discouraged.
proposes the addition of new cipher suites to the TLS
protocol  to support Kerberos-based authentication. Kerberos
credentials are used to achieve mutual authentication and to
establish a master secret which is subsequently used to secure
one of the main strengths of the TLS protocol.
Clients and servers can negotiate cipher suites to meet specific
security and administrative policies. However, to date,
authentication in TLS is limited only to public key solutions. As a
result, TLS does not fully support organizations with heterogeneous
security deployments that include authentication systems based on
symmetric cryptography. Kerberos, originally developed at MIT, is
Medvinsky & Hur Standards Track [Page 1]
RFC 2712 Addition of Kerberos Cipher Suites to TLS October 1999
based on an open standard  and is the most widely deployed
symmetric key authentication system. This document proposes a new
option for negotiating Kerberos authentication within the TLS
framework. This achieves mutual authentication and the establishment
of a master secret using Kerberos credentials. The pr...