COMP128-2 algorithm

On Thu, 12 Feb 2004 15:21:17 +0100, Micha³ Dielehner wrote:

> Does anyone know what algorithm is actually used as COMP128-2 or COMP128-3?
> These algorithms (as everyone knows ) are used as combined A3/A8
> algorithm in GSM networks.
> I've already found implementation of COMP128 but haven't found anything
> about the two mentioned above.

What you can get is here:

http://www.gsmworld.com/using/algori.../55205-600.pdf

3GPP TS 55.205 V6.0.0 (2002-12)
Technical Specification
3rd Generation Partnership Project;
Technical Specification Group Services and System Aspects;
Specification of the GSM-MILENAGE Algorithms:
An example algorithm set for the GSM
Authentication and Key Generation functions A3 and A8
(Release 6)



Why you can't get what you want is here:

GSM algorithms subject to application

The following example A3/A8 algorithm specifications are available to
qualified industry parties (GSM network operators and manufacturers of
eligible GSM equipment) on application to the GSM Association: COMP128

COMP128-2
COMP128-3

Application packs for the above algorithms can be requested from
security@gsm.org. A per-copy fee of EUR2,000 is chargeable to non-members
of the GSM Association wishing to receive these algorithm specifications.


<Insert usual derisive comments about Security Through Obscurity here>

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