Technion researchers crack GSM cellular phone encryption

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Theo Armand - 03 Sep 2003 09:12 GMT

Note the story:

Technion researchers crack GSM cellular phone encryption

Now posted on the Israel Insider website
(http://www.israelinsider.com)

Direct link to story:

http://web.israelinsider.com/bin/en.jsp?enPage=ArticlePage&enDisplay=view&enDisp
What=object&enDispWho=Article%5El2704&enZone=Security&enVersion=0&

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Will Spencer - 03 Sep 2003 10:27 GMT

>Note the story:
>
[quoted text clipped - 6 lines]
>
>http://web.israelinsider.com/bin/en.jsp?enPage=ArticlePage&enDisplay=view&enDisp
What=object&enDispWho=Article%5El2704&enZone=Security&enVersion=0&

That article was... unfulfilling. It lacked any degree of useful
detail.

http://www.iacr.org/conferences/crypto2003/2003Program.html

The presentation referenced at Crypto 2003 was "Instant
Ciphertext-Only Cryptanalysis of GSM Encrypted Communication" by
Elad Barkan, Eli Biham, and Nathan Keller.

http://groups.yahoo.com/group/brasilcrypt/message/90

Brasilcrypt points out that this is a cryptanalysis against A5/2.

"Instant ciphertext-only cryptanalysis of GSM encrypted communication
- E Barkan, E Biham, N Keller - para clonar linha GSM com protocolo
A5/2 em menos de um segundo, off-the-air."

The conference proceedings are available, in paper, for 70 Euros from
http://www.springer.de/

Eli Biham had previously published "Cryptanalysis of the A5/1 GSM
Stream Cipher" with Orr Dunkelman.

Also of interest is:
http://www.simovits.com/archive/a52.pdf
Cryptanalysis of the A5/2 algorithm
By Slobodan Petrovic and Amparo Fuster-Sabater, Instituto de Fisica
Aplicada, Spain.

Will Spencer
Webmaster: http://www.gsmsecurity.com

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