Patent ID: 11971929
Assignee: WACOM CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 1:
2. The device of claim 1, wherein the processing circuitry, in operation, generates an error message indicating the presented document is not authentic in response to any of:
a failure of the verifying of the digital signatures of the requested DID documents for modifications associated with the extracted QR codes;
a failure of the validation of the requested verifiable credentials of the modifications;
a failure of the verification that the verifiable credentials of the modifications are associated with the common DID document;
a failure of the verification of the digital signature of the DID document for the presented document;
a failure of the validation of the verifiable credentials of the presented document; or
a failure of the comparing indicating the hash of the retrieved document matches the hash extracted from the verifiable credentials.