Siemens Aktiengesellschaft

Andreas Güttinger

Steffen Fries

Marco Lambio

Provided is a method for the validation of a digital certificate by a validation apparatus that checks the certificate of a communication partner on behalf of a first device, including the method steps of: the first device (requesting validation of the certificate of the communication partner at a first validation apparatus, the first validation apparatus querying validation information at a status collection apparatus, checking, in the first validation apparatus, whether validation information has been received from the status collection apparatus, and transmitting the validation information from the first validation apparatus to the first device, wherein, only in the event of a negative inspection result, the validation information of the certificate is determined in the first validation apparatus.

Method for validating a digital certificate

A method, system, transmitter, and receiver for authenticating a transmitter are disclosed. The authentication is performed using an asymmetric key pair and using a digital signature. The method for authenticating the transmitter includes generating a user identification, calculating the digital signature, generating an authentication request message, and transmitting the authentication request message to a receiver.

Method, system, transmitter, and receiver for authenticating a transmitter

A method and system for authorizing a user at a field device by a portable communications device. A first information is acquired by the portable communications device for identifying the field device. The portable communications device sends to a system the first information and a second information for identifying at least one of (i) the portable communications device, and (ii) the user thereof. The system determines a first piece of access information on the basis of the first information and the second information, and sends the first piece of access information to the portable communications device. The portable communications device transmits the second information and the first piece of access information to the field device. The field device determines a second piece of access information on the basis of the second information, and compares the first piece of access information with the second piece of access information. Access to the field device is allowed upon determining that the first piece of access information and the second piece of access information match.

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Fürth, Germany

Andreas Güttinger