Archive for January, 2009
Friday 23 January 2009 @ 6:55 pm
Thursday 22 January 2009 @ 6:57 am
- asked:
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?
Wednesday 21 January 2009 @ 6:54 pm
Tuesday 20 January 2009 @ 1:33 am
Thursday 15 January 2009 @ 11:10 pm










