funsec mailing list archives
Re: Where's Waldo? (challenge)
From: Valdis.Kletnieks () vt edu
Date: Mon, 04 Jun 2007 22:00:26 -0400
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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Current thread:
- Where's Waldo? (challenge) ge (Jun 02)
- Re: Where's Waldo? (challenge) Dude VanWinkle (Jun 02)
- Re: Where's Waldo? (challenge) der Mouse (Jun 02)
- Re: Where's Waldo? (challenge) sam stover (Jun 03)
- Re: Where's Waldo? (challenge) Rob, grandpa of Ryan, Trevor, Devon & Hannah (Jun 04)
- Re: Where's Waldo? (challenge) Valdis . Kletnieks (Jun 04)
- Re: Where's Waldo? (challenge) sam stover (Jun 05)
- Re: Where's Waldo? (challenge) Valdis . Kletnieks (Jun 05)
- Re: Where's Waldo? (challenge) sam stover (Jun 05)
- Re: Where's Waldo? (challenge) Brian Loe (Jun 05)
- Re: Where's Waldo? (challenge) Valdis . Kletnieks (Jun 05)
- Re: Where's Waldo? (challenge) sam stover (Jun 05)
- Re: Where's Waldo? (challenge) Dr. Neal Krawetz (Jun 05)
- Re: Where's Waldo? (challenge) sam stover (Jun 06)
- Re: Where's Waldo? (challenge) sam stover (Jun 03)
- Re: Where's Waldo? (challenge) der Mouse (Jun 05)
- Re: Where's Waldo? (challenge) sam stover (Jun 06)