On 17 April 2015 at 11:54, Michael Rogers <[email protected]> wrote:
> Members should be able to send messages to the group, such that any > member of the group can verify that a message was written by the owner > of a particular signature key, but can't prove it to anyone outside the > group. > Isn't this a fantasy requirement? That is, if I am a member of the group and I want to prove it to someone outside the group, don't I just have them look over my shoulder?
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