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Re: voting by m of n digital signature?

daemon@ATHENA.MIT.EDU (dan@geer.org)
Mon Nov 10 14:07:46 2008

From: dan@geer.org
To: "James A. Donald" <jamesd@echeque.com>
cc: cryptography@metzdowd.com
In-Reply-To: Your message of "Sun, 09 Nov 2008 19:19:10 +1000."
             <4916AB0E.4000108@echeque.com> 
Date: Sun, 09 Nov 2008 14:56:27 -0500


"James A. Donald" writes:
-+-----------------------
 | Is there a way of constructing a digital signature so
 | that the signature proves that at least m possessors of
 | secret keys corresponding to n public keys signed, for n
 | a dozen or less, without revealing how many more than m,
 | or which ones signed?
 | 

quorum threshhold crypto; if Avishai Wool or Moti Yung
or Yvo Desmedt or Yair Frankel or...  are here on this
list, they should answer

a *tiny* contribution on my part

  http://geer.tinho.net/geer.yung.pdf

humbly,

--dan

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