Håvard Vegge <hava...@stud.ntnu.no> writes:
> Hi!
>
> In the following code line the variable ra1 from node 1, 2 and 3 is
> assigned to r1, r2 and r3, respectively.
> r1, r2, r3 = runtime.shamir_share([1, 2, 3], Zp, self.ra1)
>
> Is it possible that just node 1 have a variable ra1 to share? In my
> mind it would have looked like this:
> r1 = runtime.shamir_share([1], Zp, self.ra1)
> Shouldn't such a scenario be possible to achieve?
Indeed it is possible, and it is not only in your mind that the code
looks like that :-)
The only additional issue is that you must make sure that P2 and P3
still participate. So the full code would look like this:
if runtime.id == 1:
r1 = runtime.shamir_share([1], Zp, self.ra1)
else:
r1 = runtime.shamir_share([1], Zp)
This way all players get their share, but it is only P1 who provides
any input.
--
Martin Geisler
VIFF (Virtual Ideal Functionality Framework) brings easy and efficient
SMPC (Secure Multiparty Computation) to Python. See: http://viff.dk/.
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