Event Attestation for Electronic Device Manufacturing
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Solution Overview
Problem
The manufacturing process of electronic devices is complex and costly due to the need for device-specific cryptographic keys and extensive network communication, especially for low-resource devices like IoT devices, where verifying the entire manufacturing process and ensuring security is challenging.
Innovation Solution
The method involves providing event attestations for specific events during the device's lifecycle, which are cryptographically authenticated and shared among multiple manufacturers, allowing devices to attest to receiving these attestations without the need for a single device-specific key, simplifying the manufacturing process and reducing communication overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If device-specific cryptographic keys are used for authentication, then security is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent segments the authentication system into two parts: device-independent event attestations that can be batch-processed during manufacturing, and device-specific cryptographic keys that are embedded separately. This segmentation allows the manufacturing process to be simplified while maintaining security, as the event attestations can be verified without requiring complex device-specific key management during the manufacturing phase.
Solution Approach 2:
The patent applies preliminary action by embedding device-independent event attestations into devices during manufacturing before the devices are deployed. These attestations pre-record information about manufacturing events, allowing verification to occur later without requiring complex real-time authentication during manufacturing. This preliminary embedding simplifies the manufacturing process while maintaining security.
2Reliability
If extensive network communication is used for verification, then authentication reliability is improved, but energy consumption and communication overhead increase
Solution Approach 1:
The patent extracts the verification process from requiring extensive network communication by embedding self-contained event attestations directly into the devices during manufacturing. These attestations contain cryptographic proof of manufacturing events that can be verified locally or with minimal network communication, reducing energy consumption and communication overhead while maintaining authentication reliability.
3Reliability
If device-specific keys are required for each manufacturer, then security is improved, but ease of manufacture deteriorates
Solution Approach 1:
The patent implements universality by creating device-independent event attestations that can be used across multiple manufacturers and device types. Instead of requiring each manufacturer to implement complex device-specific key management, the system uses a universal attestation format that can be embedded by any manufacturer using standardized processes, significantly improving ease of manufacture while maintaining security through cryptographic verification.
Data Source
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AI summary
A method for validating an electronic device 2 comprises receiving attestation information provided by the electronic device 2 attesting that the electronic device 2 has received a plurality of event attestations, each event attestation providing a cryptographically authenticated attestation to the occurrence of a respective event during a lifecycle of the electronic device, and determining a validation result indicating whether the attestation information is valid. By providing separate cryptographically authenticated attestations for respective events in the lifecycle of the device, this can simplify manufacturing of the devices in a multistage manufacture process compared to an approach using a single device-specific attestation attesting that the entire process is trusted.