Hello,
the Mixminion spec includes a Use-by-Date field in a Single Use Reply
Block.
Is this a good idea?
It allows to make a good guess on which nodes are not part of the chain
(i.e. those that rotate their keys earlier then the expiry date).
Additionally it allows to narrow down one node in the chain to the set
of nodes to rotate their key on the expiry-date day. If this is only
one, then we probably know one node of the chain for sure.
Peter
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