Group Diffie-Hellman key exchange

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Group Diffie-Hellman key exchange

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1

How to make a hellie diffie key exchange with 10-20 people eg how?

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asked by anonymous 21.02.2015 / 17:04

2 answers

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score 3 · Answer 1

3

This is an open problem. While doing with two participants is trivial, and with three possible (although it involves slightly more advanced math), there is no known way to do this for four or more participants.

Two participants, generalized

The operations of the Diffie-Hellman are made not in the set of Natural, Integer, Real, etc., but rather in a cyclic group with

26.05.2015 / 17:07

0

In fact there are several proposals for group key agreements. Of course it's all very academic so there are no standards or products ready, but the protocols do exist.

Some are pretty complicated, the simplest I found this to be, here is the paper .

It is a short paper published in IEEE communication letters, it is very clear in the description of the protocol, so I think you will not have problems to understand.

Any doubt in the notation, or even in the mathematical part is just ask. ;)

25.08.2015 / 00:21

score 0 · Answer 2

In fact there are several proposals for group key agreements. Of course it's all very academic so there are no standards or products ready, but the protocols do exist.

Some are pretty complicated, the simplest I found this to be, here is the paper .

It is a short paper published in IEEE communication letters, it is very clear in the description of the protocol, so I think you will not have problems to understand.

Any doubt in the notation, or even in the mathematical part is just ask. ;)