主题：【原创】论山寨手机与Android联姻的技术基础 -- 邓侃

http://www.nytimes.com/2009/12/29/technology/29hack.html?_r=1&partner=rss&emc=rss

BERLIN — A German computer engineer said Monday that he had deciphered and published the secret code used to encrypt most of the world’s digital mobile phone calls, saying it was his attempt to expose weaknesses in the security of global wireless systems.

The action by the encryption expert, Karsten Nohl, aimed to question the effectiveness of the 21-year-old G.S.M. algorithm, a code developed in 1988 and still used to protect the privacy of 80 percent of mobile calls worldwide. (The abbreviation stands for global system for mobile communication.)

“This shows that existing G.S.M. security is inadequate,” Mr. Nohl, 28, told about 600 people attending the Chaos Communication Congress, a four-day conference of computer hackers that runs through Wednesday in Berlin. “We are trying to push operators to adopt better security measures for mobile phone calls.”

另外感兴趣的可以去看看这两个。

http://en.wikipedia.org/wiki/A5/1#Attacks_on_A5.2F1_as_used_in_GSM

http://www.blackhat.com/presentations/bh-dc-08/Steve-DHulton/Presentation/bh-dc-08-steve-dhulton.pdf