Problem
Jan and Maria have fallen in love (via the internet) and Jan wishes to mail her a ring. Unfortunately,they live in the country of Kleptopia where anything sent through the mail will be stolen unless it
is enclosed in a padlocked box. Jan and Maria each have plenty of padlocks, but none to which the
other has a key. How can Jan get the ring safely into Maria's hands?
Solution
Diffe Hilemann key exchange work's in a similar way...Jan sends the ring in a box with padlock A. Maria receives it she put her padlock B and sends it back to Jan. Jan opens his padlock A and send it back to Maria, who then opens her padlock B to get the ring.
References
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