Device Authentication via Locked Data File Challenge Response

The patent extracts the authentication process from relying on static card information and personal details that can be stolen, and instead uses a dynamic challenge-response mechanism where the user's device generates cryptographic proofs of possession. This removes the vulnerable element (static information) and replaces it with a process that proves control without exposing sensitive data.

The patent introduces an intermediary authentication server that mediates between the user's device and the payment system. This intermediary handles the challenge-response authentication process, preventing direct exposure of sensitive information while still providing strong verification. The server acts as a trusted third party that can verify device ownership without requiring users to share sensitive data.

The patent implements self-service authentication where the user's device automatically generates and processes cryptographic challenge responses without requiring user intervention. The device itself performs the authentication operations using stored cryptographic materials, eliminating the need for users to manually enter additional information or perform complex security actions during transactions.

The patent performs preliminary setup during device enrollment, where cryptographic key pairs are generated and stored securely in the device's secure element. This preliminary action prepares the device for future authentication transactions, so that during actual purchases, the complex cryptographic operations are already configured and can execute automatically without adding complexity to the transaction flow.