Method for encrypting data and a telecommunications terminal and access authorization card
AssigneeRobert Bosch GmbH
InventorsMartin Hans, Frank Kowalewski, Josef Laumen, Gunnar Schmidt, Siegfried Baer, Mark Beckmann, Wael Adi
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Abstract
A method of encrypting data, a telecommunications terminal and an access authorization card are described, which permit utilization of services of one or more service providers independently of a network operator or manufacturer of the telecommunications terminal. Encrypted data is transmitted between a service provider and the telecommunications terminal over a telecommunications network. Data to be transmitted over the telecommunications network is encrypted as a function of the service provider selected.
Claims16
A method of encrypting data to be transmitted between a selected service provider and a telecommunications terminal over a telecommunications network, the method comprising:
- encrypting the data to be transmitted over the telecommunications network as a function of the selected service provider;
- sending an identification request from the service provider to the telecommunications terminal before transmission of data between the telecommunications terminal and the selected service provider, the identification request requesting that a key that is allocated to the selected service provider be selected from a plurality of keys stored in one of the telecommunications terminal and an access authorization card inserted into the telecommunications terminal;
- encrypting the identification request using a selected key to yield an encrypted response;
- and
- transmitting the encrypted response from the telecommunications terminal to the selected service provider for authentication of the telecommunications terminal;
- wherein the data to be transmitted is encrypted using the selected key for encrypting the identification request for authenticating the telecommunications terminal.
A telecommunications terminal for exchanging data with a service provider over a telecommunications network, comprising:
- an encryption unit for encrypting data to be transmitted to the service provider;
- a memory for storing at least one key allocated to the service provider;
- and
- a transmitting device for sending an encrypted response to the service provider for authentication of the telecommunications terminal, wherein the encryption unit generates the encrypted response by encrypting an identification request received from the service provider using the at least one key allocated to the service provider;
- wherein the data to be transmitted is encrypted using the at least one key for encrypting the identification request.
An access authorization card for use in transmission of data between a service provided and a telecommunications terminal over a telecommunications network, comprising:
- a memory for storing at least one key allocated to the service provider;
- an encryption unit for encrypting the data to be transmitted to the service provider using the at least one key allocated to the service provider, wherein the encryption unit also generates an encrypted response for authentication of the telecommunications terminal, the encrypted response being generated by encrypting an identification request received from the service provider using the at least one key allocated to the service provider, and wherein the encrypted response is sent to the service provider for authentication of the telecommunications terminal via a transmitting device of the telecommunications terminal;
- and
- an interface unit for exchanging the encrypted data with the telecommunications terminal.
Dependencies are inferred from the claim text.