DID Ticket Credential Verification to Block Illegal Transfers

The patent introduces a VDR (Verifiable Data Registry) as an intermediary component that stores and manages DID documents and verification methods. This intermediary enables decentralized authentication without requiring a central authority, resolving the contradiction between preventing illegal transfers and maintaining system simplicity. The VDR acts as a trusted mediator that issues and verifies credentials while preserving user privacy and control.

The patent replaces traditional centralized mechanical ticketing systems with a cryptographic-based decentralized system. Instead of relying on centralized databases and authentication servers, the system uses cryptographic primitives (DIDs, VCs, VPs, verification methods) to establish trust and verify ownership. This substitution enables secure ticket ownership verification without the complexity of centralized management infrastructure.

The patent implements preliminary action by pre-registering DIDs and DID documents in the VDR before ticket issuance. The verification methods and authentication mechanisms are established in advance, so that during the actual authentication process, the system only needs to retrieve and verify pre-stored cryptographic proofs. This reduces the operational complexity during ticket verification while maintaining strong security guarantees.

The patent uses cryptographic copying mechanisms where the VDR stores verification methods and the issuer device stores issuance verification methods as reusable templates. These cryptographic copies can be efficiently verified multiple times without requiring access to the original private keys or centralized authorities, simplifying the authentication process while maintaining security.