Hi all. Has anybody written code to decrypt A5/2 just like A5/1?
I have heard that A5/2 is also a weak implementation. In 1999, Ian Goldberg and David A. Wagner cryptanalyzed A5/2 in the same month it was published, and showed that it was extremely weak — so much so that low end equipment can probably break it in real time. Since July 1, 2006, the GSMA (GSM Association) mandated that GSM Mobile Phones will not support the A5/2 Cipher any longer, due to its weakness, and the fact that A5/1 is deemed mandatory by the 3GPP association. In July 2007, the 3GPP has approved a change request to prohibit the implementation of A5/2 in any new mobile phones.[1] Are there many telecom vendors still using A5/2 today in reality compared to A5/1? References 1. http://en.wikipedia.org/wiki/A5/2 Regards Asad
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