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This reminds me of authentication protocols in cryptology, where the one-way-encryption keys are never exchanged.
A sends a sequence of random values and B must reply with the correct encryption or just a property of it. After n correct answers A will be statistically "convinced" that B had the correct key. Because of the asymmetric nature the correct key can't be deduced by a listener in the middle. I doubt it helps, but the question allows so many wild interpretations...
- Ron
In reply to Re: Reverse download protocols
by The Perlman
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