PRIVACY-PRESERVING ATTRIBUTE-BASED CREDENTIALS

摘要

The invention relates to an obfuscated program logic of machine executable instructions and a hardcoded cryptographic signing key. The obfuscated program logic further comprising a hardcoded first attribute value wherein execution of the machine executable instructions by the processor causes the obfuscated program logic to receive a request and in response to receiving the request evaluate whether the request is related to the hardcoded first attribute value. In case the request is related to the hardcoded first attribute value, then computing with the hardcoded first attribute value a response to the request and computing with the cryptographic signing key a signature, wherein the signature certifies the request for which the response was computed and certifies the authenticity of the response. Then generating and returning a presentation token comprising the response and the signature, and providing the presentation token to a receiver computer system.

主权项

1. A method for privacy preserving attribute based credentials, the method comprising:
receiving a request; evaluating whether the request is related to a hardcoded first attribute value; and based on the request being related to the hardcoded first attribute value:
computing with the hardcoded first attribute value a response to the request;computing with a cryptographic signing key a signature, wherein the signature certifies the request for which the response was computed and certifies the authenticity of the response;generating a presentation token comprising the response and the signature; andtransmitting the presentation token to a receiver computer system.