[VOIPSEC] mikey for group calls

[Gupta, Sachin]

If multicast is to be, used then D-H mode is not feasible. In case of
Unicast stream I do not see any issues, except that it will put more
computational load.
With D-H shared key conferencing can not be done.

Sachin


-----Original Message-----
From: Voipsec-bounces at voipsa.org [mailto:Voipsec-bounces at voipsa.org] On
Behalf Of Torsten
Sent: Monday, May 08, 2006 3:59 PM
To: Voipsec at voipsa.org
Subject: [VOIPSEC] mikey for group calls

Hey,

i have a question on secure group calls using MIKEY. It is written in
the RFC, that it is not possible to use Diffie Hellman for group calls,
only public-key encryption and pre-shared keys. In section 8.2 of the
RFC, you can see a figure showing a small-size interactive group; I
think this is the best way to establish a 3-way conference. Each client
sets up the security for its outgoing streams. Why it is not possible to
use DH in this scenario?
Are there other solutions for setting up a secure 3-way conference using
MIKEY?


Torsten

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