Re: [math-fun] Russian Postal Problem

9 May 2016

      Assuming locks are cheap,

1.  B sends *unlocked padlock* in *unlocked box* to A.

2.  A places ring in box & *locks with B's lock* & sends back to B.

3.  B uses B's key to unlock B's padlock.

Problem: Can Postal Service manufacture a key for an unlocked padlock -- perhaps using a quantum computer?

Henry Baker