Re: Members of Parliament Problem

I wrote:

[...] There are also systems in which group or subset of a group is necessary to sign the message, the original work was by Yves Desmet in his paper "Social Cryptography" in Crypto 88 or 89 I think.

Correction: That should have been "Society and Group Oriented Cryptography: A new approach" by Yves Desmedt in Crypto '87 [It was sitting next to my desk and I was too lazy to reach over and check...sigh.] This particular paper deals with groups recieving messages and requiring a subset to decrypt, a later paper by Desmedt (or maybe Desmedt and Yao) deals with the signature system I described. jim