Verifying a submitted identity

[Dan Lyke]

Martin Atkins writes:
> state, in my opinion. An easy improvement would be to limit how far in 
> the past the timestamp can be, as we've discussed previously.)

One of the issues we had with early LID development was clock drift,
which is why timestamps were dropped from that protocol and replaced
with the suggestion that if you aren't passing anything else
significant in your nonce/app-data you pass your timestamp and check
for some time limit against that.

Dan