SDA Releases GSM Voice-Privacy Algorithm A5/1The Smartcard Developer Association (SDA) and two U.C. Berkeley researchers released A5/1, the "stronger" of the two GSM voice-privacy algorithms back in 1998. Continued research in the area has resulted in a number of recent (2007/2008) articles.
SDA Shows Cloning of Digital GSM Cellphones PossibleThe Smartcard Developer Association (SDA) and two U.C. Berkeley researchers discovered that digital GSM cellphones are susceptible to cloning.
We have made available an overview of our results, including some detailed technical information.
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Readers of the scard mailing list have pointed out that, in Europe, one can anonymously rent GSM cellphones quite cheaply. The prospect of those phones getting cloned is a bit worrisome.
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1998/1999 GSM SDA related press coverage