Next | You can't get there from here | 52 |

Now V flips a coin and tells P what it is

If heads, P reveals

**all**the encryption keys

| ||||||||||||||||||||||

ai500 br558 | ai500 po839 | ai500 er054 | ||||||||||||||||||||

br558 ca426 | br558 da573 | br558 ph160 | ||||||||||||||||||||

ca426 da573 | ca426 pa910 | da573 er054 | ||||||||||||||||||||

da573 pe379 | er054 pe442 | pa910 po839 | ||||||||||||||||||||

pe379 po839 | pe379 ph160 | pe442 ph160 |

V can confirm that P did in fact encrypt the HC problem under discussion

But she has no idea which routes were part of the itinerary

If tails, P reveals

**only**the keys for the routes in the itinerary

| ||||||||||||||||||||||

ai500 br558 | ai500 po839 | ai500 er054 | ||||||||||||||||||||

br558 ca426 | br558 da573 | br558 ph160 | ||||||||||||||||||||

ca426 da573 | ca426 pa910 | da573 er054 | ||||||||||||||||||||

da573 pe379 | er054 pe442 | pa910 po839 | ||||||||||||||||||||

pe379 po839 | pe379 ph160 | pe442 ph160 |

V can readily verify that they do form an itinerary of the right length

But since she doesn't know what city

`ai500`represents, she doesn't know the real itinerary

Next | Copyright © 2005 M. J. Dominus |