"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




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