Re: time dependant

[Matt Crawford]

> In the future, it may be possible to base something like this on
> physical principles.  For example (and if I haven't dropped a decimal
> point), Jupiter is never closer than about 2079 light-seconds from
> Earth.  A message encrypted with the public key of a satellite in that
> orbit could not be received in the clear on Earth in less that 4158
> seconds.  One could postulate a network of ...

If you're going to trust that CryptoSat, inc. hasn't stashed a local
copy of the private key, why not eliminate all that radio gear and trust
CryptoTime, inc. not to publish the private key associated with date D
before date D?
                                Matt