Re: Where's Waldo? (challenge)

[Valdis.Kletnieks () vt edu]

On Mon, 04 Jun 2007 18:15:36 -0800, "Rob, grandpa of Ryan, Trevor, Devon & Hannah" said:
> Date sent:            Sun, 03 Jun 2007 16:35:10 -0400
> From:                 sam stover <sam.stover () gmail com>
>
> > But how much do you trust your friend?  You could always encrypt a file
> > (with any/all pertinent details) w/ his public key, send it to him, and
> > he could open it when he is "ready" to see if you knew the answer.
>
> How about encrypting the answer with a key, said key derived from the location 
> of Waldo ...

But that doesn't meet the requirement. If the answer is encrypted, I can't
verify that you actually KNOW the answer and didn't just encrypt a random
string with a random key.

Think about why kidnappers send photos of the victim holding a copy of today's
newspaper - they do a good job of proving the kidnappers have a live victim
(at least as of when the paper went to press), but don't give you any info
about *where* they have the victim.

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