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www.inacon.de/bookstore/books_gsm_a-z.php

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Posted by crouse

Its by A5 algorithm

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Posted by HamidAliKhan

visit it
network. While the basic authenticated cipher instruction mechanism does not protect against the abuse of WLAN triplets in a. GSM context, it does protect ...
www.3gpp.org/FTP/TSG_SA/WG3_Security/TSGS3_34_Acapulco/Docs/PDF/S3-040574.pdf -

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Posted by waqasahmad

Through A5 algorithm

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Posted by Hash007

In GSM network a stream cipher algorithm is used known as the A5 algorithm which is used for encryption of the messages and it is initialized with a session key(Kc) and same key is used throughout the call but frame number changes during the call, thus generating a unique key stream for every frame.

The same Session Key (Kc) is used as long as the MSC does not authenticate the Mobile Station again.

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Posted by sagitraz

Please follow the links , they would be help ful for you.

1. www.inacon.de/bookstore/books_gsm_a-z.php

2. www.tml.tkk.fi/Opinnot/Tik-110.400/2000/gsm/detailgsm.html

3.www.patentstorm.us/patents/6643513/description.html

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Posted by jahangir1983