Siemens Aktiengesellschaft

Infineon Technologies Ag

Martin Euchner

Wolfgang Klasen

Volker Kessler

Volkmar Lotz

Haykal Tej

Sebastian Mödersheim

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.

Method for securing data traffic in a mobile network environment

Data from a transmitter is extended to include authentication data on the application level by an application protocol. The authentication data is used by the receiver to determine whether the transmitter is known by the receiver. If the transmitter is known by the receiver, the data is accepted. If not, the data is rejected.

Method and system for transmitting data from a transmitter to a receiver and transmitter and receiver therefor

In order to authenticate a first entity at a second entity, a first number is generated by way of an asymmetric cryptographic method. This first number is symmetrically encoded and transmitted to the second entity. The second entity checks the first number by decoding the second number and thereby authenticates the first entity.

Method and array for authenticating a first instance and a second instance

Device and method for the cryptographic processing of a digital data stream presenting any number of data

In a method for cryptographic code management between a first computer unit and a second computer unit, the method is divided into individual modular phases. Authentification references that are employed in further cryptographic phases are exchanged during an authentification of the first computer unit and the second computer unit. As a result thereof and due to the modular structure, a respectively new authentification actually required in the further cryptographic phases is no longer necessary and is also not implemented.

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Munich, Germany

Martin Euchner