Patent · US Expired

Method for improving the security of authentication procedures in digital mobile radio telephone systems

US6934531B1 · kind B1 · utility

7Cited by

6References

5Claims

0Family size

Assignee

T-Mobile Deutschland GmbH · DE

Inventors

Jens Hake · Thalheim/Erzgebirge, DE
Jörg Thelen · Bad Honnef, DE

Key dates

Filing date	Sep 7, 1999
Grant date	Aug 23, 2005
Priority date	—
Expiry date	Sep 7, 2019

Classification

Technology area (CPC H)Electricity
CPC primaryH04L2209/80
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

The invention relates to a method for improving the security of authentication procedures in digital mobile radio telephone systems. In order to make it more difficult if not impossible to work out a secret code KI, several different secret SIM-specific codes KI are contained in the mobile radio telephone network and on a subscriber identity module SIM and a code KI for the implementation of said authentication is selected from the various secret codes thus contained during the authentication process between the subscriber identity module and the mobile radio telephone system pertaining to said SIM.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.