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Box, Locks and Keys (Posted on 2003-07-18) Difficulty: 4 of 5
You want to send a valuable object to a friend securely. You have a box which can be fitted with multiple locks, and you have several locks and their corresponding keys. However, your friend does not have any keys to your locks, and if you send a key in an unlocked box, the key could be copied en route.

How can you send the object securely?

See The Solution Submitted by Ravi Raja    
Rating: 3.4167 (12 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
Comment on the official solutionbroll2016-04-10 00:06:04
Some ThoughtsAn observation of the 'official' solution (spoiler)Dej Mar2008-09-26 07:11:52
This seems too easy, or is it?Steve2003-12-17 00:13:06
re: No problemJack McBarn2003-11-11 11:01:06
just a guessKelly2003-08-11 00:13:35
disappointmentnellie2003-07-27 07:08:11
Solution (Maybe)Ryan2003-07-23 16:53:46
think i got itmaddi2003-07-23 16:32:18
re(4): solutionexoticorn2003-07-23 00:55:59
Some ThoughtsSmarty Pants Solutionryan smith2003-07-21 23:06:30
re(3): solutionryan smith2003-07-21 22:58:28
SolutionDependsLewis2003-07-21 20:56:45
re: Possible Solutionexoticorn2003-07-19 01:24:32
re(2): solutionexoticorn2003-07-19 01:20:08
re: Possible SolutionTomM2003-07-18 19:39:45
SolutionPossible SolutionDJ2003-07-18 18:34:01
re: solutionDJ2003-07-18 18:33:07
No problemnellie2003-07-18 09:09:08
Solutionsolutionexoticorn2003-07-18 08:05:43
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