[Cisspstudy] Symmetric cryptography - Authentication

[Clement Dupuis]

Good day,

IPSEC, SSL, TLS, all comes to mind.

Diffie Hellman hiding within those protocol does it for you in the
background.

Take care

Clement

Clément Dupuis, CD
CISSP, GCFW, GCIA, QEH, QSA, Security+, CEH, ECSA, LPT, CCSA, CCSE, MBNS,
MBIS, MBHS,  ACE
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On Sat, Oct 10, 2009 at 14:00, Andrea Gatta <andrea.gatta at gmail.com> wrote:

> Hi,
> several sources include authentication - or better system or message
> authentication - as one of the symmetric criptography security services (the
> other is clearly confidentiality).
>
> Clearly the authentication provided by symmetric key crypto cannot provide
> non-repudiation since it uses one single key to encrypt/decrypt and which is
> not tied to a uniquely identifiiable user.
>
> As for the implementation of the above concept, I can think at the way
> Kerberos authenticate principals - possession of the session key (other than
> authenticator information).
>
> Other than that an example of this could be CBC-MAC.
>
> Can someone provide other explamples or better some place in which
> symmetric key crypto and authentication are treated more systematically ?
>
> Thanks
> Andrea
>
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