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quantum multiverse bedtime story
 

offline jkd from Twitch City (Canada) on 2007-07-30 15:10 [#02107733]
Points: 1138 Status: Lurker



An encrypted message between terrorists is intercepted by
an intelligence agency (IA).

The IA has been given information that decoding the message
is the only way to stop a nuclear attack on their country.
They receive the encrypted message 15 seconds before the
nuclear attack is to be launched.

A computer scientist starts up a brute force decryption
program which randomly guesses at decryption keys. There are
2^1024, or
179,769,313,486,231,590,772,930,519,078,902,473,361,797,697
,894,230,657,273,430,081,157,732,675,805,500,963,132,708,47
7,322,407,536,021,120,113,879,871,393,357,658,789,768,814,4
16,622,492,847,430,639,474,124,377,767,893,424,865,485,276,
302,219,601,246,094,119,453,082,952,085,005,768,838,150,682
,342,462,881,473,913,110,540,827,237,163,350,510,684,586,29
8,239,947,245,938,479,716,304,835,356,329,624,224,137,216
possible keys. Those are some pretty bad odds. But he has a
theory.

His computer program guesses the decryption key on the first
guess, and he uses the decoded information to stop the
nuclear attack. They're saved.

The other IA members stare at him, their jaws dropped to the
floor, eyes wide.

Apparently, in all of the possible outcomes (other than this
one), they all died instantly in a flash of nuclear fission.
Ouch times 2^1024 - 1.


 

offline J198 from Maastricht (Netherlands, The) on 2007-07-30 15:18 [#02107735]
Points: 7342 Status: Lurker | Show recordbag



what is his theory?


 

offline dave_g from United Kingdom on 2007-07-30 15:22 [#02107737]
Points: 3372 Status: Lurker



I think what he is saying is that the bloke just guesses and
manages to guess correctly. If parallel worlds exist, and
they also guessed but incorrectly, then they would be
nuked.
The odds are that with enough parallel universes each
randomly guessing differently, some will guess right and be
saved.

Personally I'm glad that it was random chance and not the
good ol US of A saving the world for once.



 

offline J198 from Maastricht (Netherlands, The) on 2007-07-30 15:49 [#02107747]
Points: 7342 Status: Lurker | Followup to dave_g: #02107737 | Show recordbag



you sir, are clever.


 

offline big from lsg on 2007-07-30 15:52 [#02107749]
Points: 23720 Status: Regular | Followup to dave_g: #02107737 | Show recordbag



actually this is gw's anti terrorist defense


 

offline mrgypsum on 2007-07-30 21:54 [#02107835]
Points: 5103 Status: Lurker | Followup to big: #02107749



he likes those odds


 


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