GPRS algorithms

A5/4 & GEA4 algorithms

ETSI is a Custodian of the A5/4 encryption algorithms for GSM and EDGE, and the GEA4 encryption algorithm for GPRS, which have been developed through the collaborative efforts of the European Telecommunications Standards Institute (ETSI), T1 Committee and the GSM MoU Association.
They may be used only for the development and operation of GSM, EDGE and GPRS mobile communications and services.
They may be used only for the development and operation of GSM, EDGE and GPRS mobile communications and services. Every Beneficiary intending to implement and/or use the algorithms must sign a Restricted Usage Undertaking with a Custodian and demonstrate that he fulfills the approval criteria specified in the Restricted Usage Undertaking.
The A5/4 and GEA4 algorithms are based on the 3GPP ciphering algorithm (F8), for which Mitsubishi Electric Corporation holds essential patents on the Algorithms. For the purposes of implementing the A5/4 and GEA4 algorithms, Mitsubishi has agreed to grant licenses on a royalty free basis. Beneficiaries must get an IPR license agreement from Mitsubishi Electronic Corporation Japan. 

Contact details are:
Mitsubishi Electric Corporation
Corporate Licensing Department
Mr. Hisashi Kato
2-7-3 Marunouchi, Chiyoda-ku
Tokyo 100-8310 Japan
Fax: +81 3 3218 2474
Tel: +81 3 3218 3465
 
Licensing  procedure within ETSI is the following:
Every Beneficiary must send to the ETSI Secretariat two signed paper copies of the A5/4 GEA4 Restricted Usage Undertaking with the Administrative Charge of  2 000 € excluding V.A.T.  Upon receipt of payment the Beneficiary will then receive one copy of the  Restricted Usage Undertaking duly signed by ETSI by express mail with the algorithms. Please note that ETSI will have to obtain from the French Authorities an export licence for all Countries outside the EU. 

The specifications are available for download below:

 A5/3 & GEA3 algorithms

ETSI is a Custodian of the A5/3 encryption algorithms for GSM and EDGE, and the GEA3 encryption algorithm for GPRS , which have been developed through the collaborative efforts of the European Telecommunications Standards Institute (ETSI), T1 Committee and the GSM MoU Association.

They may be used only for the development and operation of GSM, EDGE and GPRS mobile communications and services. Every Beneficiary intending to implement and/or use the algorithms must sign a  Restricted Usage Undertaking with a Custodian and demonstrate that he fulfills the approval criteria specified in the Restricted Usage Undertaking.

The A5/3 and GEA3 algorithms are based on the 3GPP ciphering algorithm (F8), for which Mitsubishi Electric Corporation holds essential patents on the Algorithms. For the purposes of implementing the A5/3 and GEA3 algorithms, Mitsubishi has agreed to grant licenses on a royalty free basis. Beneficiaries must get an IPR license agreement from Mitsubishi Electronic Corporation Japan. 

Contact details are:
Mitsubishi Electric Corporation
Corporate Licensing Department
Mr. Hisashi Kato
2-7-3 Marunouchi, Chiyoda-ku
Tokyo 100-8310 Japan
Fax: +81 3 3218 2474
Tel: +81 3 3218 3465
 
Licensing  procedure with ETSI is the following:
Every Beneficiary must send to the ETSI Secretariat two signed paper copies of the A5/3 GEA3 Restricted Usage Undertaking  with the Administrative Charge of  2 000 € excluding V.A.T.  Upon receipt of payment the Beneficiary will then receive one copy of the  Restricted Usage Undertaking duly signed by ETSI by express mail with the algorithms. Please note that ETSI will have to obtain from the French Authorities an export Licence for all Countries outside the EU. 

The specifications are available  for download below:

GPRS GEA2 algorithm

ETSI is the Custodian of the GPRS GEA2 algorithm for the protection of the information exchanged over the radio channels of a GSM General Packet Radio Service (GPRS) system.
The following documents are available for download:

 

For all further information concerning the above algorithms, please contact us at:

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ETSI
650 Route de Lucioles
F-06921 Sophia Antipolis CEDEX
France
Tel   +33 4 9294 4216
Fax   +33 4 9294 4270