[P2P-F] Multi-party-Computation Cryptography. Why it is important..

Fri Jul 15 02:59:06 CEST 2011

I have found  this kind of cryptography recently and I thought you might
like it. (As always, no warranties)

What is MPC?

Participants - peers agree to evaluate a specific function. They will give
their data and each one of them will receive part of the evaluation.
One's data and results are kept private from the others.
No one can cheat, Noone can try to change the rules without the others
agreeing.

This is called an Ideal Functionality.
 http://en.wikipedia.org/wiki/Universal_composability#Ideal_functionality

In its essence, it emulates the existence of a trusted party - Government
that enforces that participants abide by the rules.

How does this change the way we design new economic alternatives?

1. We can create economic alternatives that are based on the fact that all
information is known. Today each and every corporation withholds information
from the general public.

2. If a) We create an economic system based on a function that if not used
will have important economic loses for that person.
      b) the function we use doesnt deteriorate the states of the other
participants if someone sends false data.(while abiding by the rules)

then any rules participants agree to will be enforcable.

What are the changes, again?

We can create an imaginary economic system and we dont have to worry any
more about corrupt governments, institutions etc. Whatever the societal
structures might be created, they will not be able to be corrupted in such a
way as to deviate from the rules of the function.

Why is MPC important ,again?

We should stop trying to make small changes because we find it difficult to
'enforce' them. We should start thinking big.

Lets start by rejecting anything we knew till now.

Check this example: http://viff.dk/doc/applications.html#nordic-sugar for an
understanding how it works...

references:http://viff.dk/
                http://en.wikipedia.org/wiki/Secure_multi-party_computation

ps. my economic model relies on the existence of such a non-corruptible
government.

-- 

Sincerely yours,

     Apostolis Xekoukoulotakis
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