GSM A5 Files

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RayAir

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Dec 31, 2005
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The algorithm was bunk. Even though it said it used a 64-bit key, the key could be brute forced in the amount of time it takes to crack a 30-bit key. This is good reason not to trust proprietary encryption.

I just read a book which discussed the A5 algorithm. It was written by Bruce Schneider, Secrets and Lies
http://www.amazon.com/Secrets-Lies-Digital-Security-Networked/dp/0471453803
 
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