[Gsmmap] A5/3 Encryption algorithm in Turkcell

Linus Neumann linus at srlabs.de
Mon May 11 14:58:30 CEST 2015

Dear Bulent,

The last assessment of Turkcell’s 2G encryption was conducted in Feb 2013.
This is why GSMmap does not yet reflect your update which was conducted in 2014.

Lately, we received a number of 3G-assessments from Turkcell’s network.
In case these were submitted by you, please put your phone into 2G-only-mode to provide an assessment of the 2G-encryption.

Thank you very much for your interest, and – hopefully – your contribution to the project,

Date: Monday 11 May 2015 18:10
To: gsmmap
Subject: A5/3 Encryption algorithm in Turkcell

Dear All,

According your research documentation, Turkcell has 0% A5/3 implementation in its network. But as Turkcell, we completed our A5/3 rollout at the end of February, 2014.

We think that there is a mistake in your research document. Could you please give detailed information How you provided these informations?

Best Regards,

[cid:image001.png at 01CED703.CAE5BAD0]
Bulent Guler (PhD.,EE)
Topselvi Mah. Dipcik Sk. No:31 Kartal 34873 Istanbul
M: (+90) 532 210 14 87 T: (+90) 532 910 14 87 E: bulent.guler at turkcell.com.tr<mailto:bulent.guler at turkcell.com.tr>


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