Re: Where's Waldo? (challenge)

["Dude VanWinkle" <dudevanwinkle () gmail com>]

what do you think of this one:

give your friend the descriptions of four people in the crowd, each
exactly 10 people away from waldo at different cardinal points.

He will have a hard time finding these people, due to the nature of
the game, and would have an easier time of it just looking for waldo.
Once your friend finds waldo, he will be able to verify your markers.



On 6/2/07, ge () linuxbox org <ge () linuxbox org> wrote:
> This is an interesting excersize in security, to quote:
>
>     "A friend of mine gave me a riddle this morning regarding "Where's
>     Waldo?". The riddle is as follows:
>
>     You and a friend play "Where's Waldo?". You solve the puzzle before
>     your friend, and you want to prove to your friend you solved the
>     puzzle, without giving him any hints. How do you do this?"
>
> Zero knowledge? Geographic descriptions? Riddles? Hashes?
> How do you let your friend know that you solved it, without helping out?
> What is your solution to this problem? Be creative and leave comments.
>
> Math not required (please) but allowed (if you must). :)
>
> For solutions and cool ideas, visit this blog post. There's some other
> cool stuff on that blog:
> http://www.algorithm.co.il/blogs/index.php/math/where-is-waldo-or-security-by-origami/
> http://www.algorithm.co.il/blogs/
>
> So far, only one exciting result from folks on securiteam:
> http://blogs.securiteam.com/index.php/archives/917
>
>         Gadi.
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