Client chaning not described

[wbl]

[Ceri] The introduction states that “the Roughtime protocol provides cryptographic proof of malfeasance, enabling clients to detect and prove to a third party a server's attempts to influence the time a client computes” but the mechanism by which clients detect this malfeasance, chaining Roughtime requests/responses, is not described in this paper. To prove the thesis of the paper, a description of how clients accomplish chaining and how they can detect malfeasance within the chain should be included since those are essential parts of the protocol’s usage. Examples of what clients do once they detect malfeasance would then fit well into the separate Roughtime ecosystem paper.