Importance

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Abstract

A method for checking electronic authorization inspection information, in which an electronic authorization inspection information item comprises text and/or graphics information describing usable services, a reference to a user identification document and a digital signature which is calculated from the text and/or graphics information and the reference to the user identification document using a private key for an asymmetric encryption method. The authorization inspection information item is stored in a data processing system belonging to a trustworthy entity and in an electronic appliance belonging to a user. Nominal presets for the check are ascertained by retrieving the authorization inspection information item stored in the data processing system or by detecting the digital signature stored in the appliance, reading it using a public key associated with the private key and breaking it down into text and/or graphics information and a reference to the user identification document. The text and/or graphics information describing usable services and the reference to the user identification document for the authorization inspection information item stored in the electronic appliance are compared with a respective nominal preset for a match, presence of the user identification document is ascertained.

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First Claim