Method for securing data traffic in a mobile network environment

US7480801B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Martin Euchner · Hersbruck, DE
• Volkmar Lotz · Birkenfeld, DE
• Sebastian Mödersheim · Gundelfingen, DE
• Haykal Tej · Birkenfeld, DE

Key dates

• Filing date: Jul 26, 2004
• Grant date: Jan 20, 2009
• Expiry date: Jun 8, 2026

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04W12/069
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

In order to secure data traffic between an external network and a mobile user terminal coupled to the external network, the terminal and a data securing device of the external network produce a pair of private external keys by exchanging partial keys. One item of key information based on at least one of the partial keys, and one message certified by the terminal with a first home location key of the pair of home location keys, are transmitted by the data securing device to the home location network. The certification of the message is verified with a second home location key of the pair of home location keys and a certificate is issued for the key information. The certificate thus provided is transmitted to the data securing device and the pair of private external keys is accepted, subject to the verification of the transmitted certificate, in order to secure data traffic.