Post
Topic
Board Development & Technical Discussion
Re: Protocol or Paper for Joint Random Secret Sharing (JRSS)...?
by
Crowex
on 11/03/2015, 21:13:45 UTC
To extend this to a t of n case they must make sure that each and all of the possible subsets of t signers hold the same multiplicative secret. I can see how this could possibly be done with a dealer but I can’t understand how it is done without a dealer.
Of course this could just be due to my lack of understanding but I reserve the right to keep asking stupid questions in order to try and improve my understanding. Smiley
I don't see it either, except by repeating the process for each of the the m choose n satisfactions; which you can't do for a single secret without a dealer. Thats why I was asking in the other thread where this was implemented when someone said it was.

 Glad to see you detected there might be a problem too, I had a bit of self doubt after I first posted a comment and blog question (hence the edit) but then the more I look at it the more I am convinced that their scheme does not extend to the t-of-n case in the way that they described.
 I don't think it will work with or without a dealer for t-of-n. The methods I imagined might be used with a dealer scheme seem to have security problems.

 I'll see if I get a response to my last blog question that will provide any clarification.