Beacon Circuit Hardware Trust Verification

The patent applies preliminary action by incorporating beacon circuits and protection modules into the hardware design before manufacturing. These security mechanisms are pre-configured with unique identifiers and cryptographic keys that enable post-manufacturing verification. The beacon circuit is integrated into the design flow such that it becomes part of the manufactured device, allowing security verification to occur after the device is built but before deployment.

The patent uses beacon circuits as intermediaries between the hardware device and the verification system. The beacon circuit contains unique identifiers and cryptographic keys that mediate the trust relationship between the device manufacturer and the end user. When triggered, the beacon circuit provides measurable outputs (power consumption, timing characteristics) that serve as cryptographic proof of the device's identity and integrity, enabling verification without exposing sensitive design information.

The patent implements feedback by creating a verification loop that occurs after manufacturing. The beacon circuit provides measurable outputs (power consumption profiles, timing characteristics, digital signatures) that can be verified against expected values. This feedback mechanism allows the design owner to verify that the manufactured device matches the intended design, even though the manufacturing process occurred at an untrusted foundry. The feedback closes the security verification loop without requiring control over the manufacturing process itself.

The patent applies preliminary action by embedding verification mechanisms (beacon circuits with unique identifiers and cryptographic keys) into the design before outsourcing manufacturing. These pre-configured security features ensure that even though the foundry controls the manufacturing process, the final device contains built-in evidence of its identity and integrity that can be verified later.

The patent merges the beacon circuit functionality with the existing hardware device architecture. The beacon circuit is integrated into the design such that it shares resources with the main device logic, including using the same power supply, clock signals, and physical substrate. The unique identifier and cryptographic keys are stored in the same security structures as the rest of the device, eliminating the need for separate dedicated security hardware and reducing overall complexity.

The beacon circuit is designed to be multi-functional, serving both as a security verification mechanism and as part of the normal device operation. The same circuit structures that provide device functionality also provide the beacon signals for verification. The unique identifier and cryptographic keys are used both for device operation and for security verification, eliminating the need for separate dedicated security hardware and reducing overall device complexity.

The patent applies periodic action by triggering the beacon circuit only at specific verification points rather than continuously. The beacon is activated periodically during manufacturing, testing, or deployment phases when verification is needed, and remains dormant during normal device operation. This periodic triggering minimizes the time the beacon circuit consumes power while still providing verification capability when required.

The beacon circuit performs verification functions with partial action, focusing only on the specific measurements needed for security verification (power consumption profiles, timing characteristics, digital signatures) rather than full device functionality. This partial verification approach reduces the computational and power overhead compared to running complete device tests, while still providing sufficient detection capability for malicious implementations.