Security Peripheral Interfaces for Predictable RoT Interoperability
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Solution Overview
Problem
Existing approaches to security circuitry in electronic devices are inadequate to combat diverse and varied software, hardware, and wireless attacks, particularly in the design and testing phases, leading to security threats and interoperability issues, making them less secure and more costly and cumbersome.
Innovation Solution
Implementing an adaptable and flexible framework for security circuitry that enables interoperability between different types of circuits through a common communication protocol, ensuring predictable and stable interactions, and incorporating multiple peripheral devices to enhance security functionalities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing approaches to security circuitry are used, then basic security functions are provided, but the circuitry is inadequate to combat diverse attacks and has interoperability issues
Solution Approach 1:
The patent implements a universal interface specification that enables peripheral devices to communicate through standardized protocols. This allows the security circuitry to work with multiple types of peripheral devices (cryptographic accelerators, secure storage, biometric sensors) without requiring device-specific interfaces, thereby improving both security effectiveness and interoperability simultaneously
2Reliability
If existing security circuitry designs are implemented, then security functions are provided, but design and testing efforts are excessive and costly
Solution Approach 1:
The patent establishes a predefined interface specification and compliance verification framework before actual device integration. By setting forth the communication protocols, signal definitions, and interaction models in advance, and by implementing automated compliance checking mechanisms, the patent eliminates the need for extensive ad-hoc design and testing during integration, significantly reducing development time while maintaining security rigor
Solution Approach 2:
The patent incorporates compliance verification mechanisms that provide feedback on whether peripheral devices meet the interface specification requirements. This automated feedback system identifies interoperability issues early in the design process, allowing developers to correct problems before full-scale testing, thereby reducing overall development time and costs
Data Source
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AI summary
An IC chip can provide silicon root of trust (RoT) functionality. In described implementations, the IC chip includes a processor (202), an interconnect (110), and multiple peripheral devices (250). These comportable circuit components are designed to facilitate interoperability and consistent, expected communications for security circuitry. Each peripheral device includes an interface (302) that adheres to a common framework for interacting with the processor and with other peripheral devices. The interface includes an interconnect interface (304) coupling the peripheral device to the interconnect and an inter- device interface (306) coupling the peripheral device to at least one other peripheral device. The peripheral device is realized based on a peripheral device design code that indicates inter-device signaling (316) in accordance with an inter-device scheme of an interface specification. Manufacturers fabricate the peripheral device, based on the design code, to be physically and logically coupled to another peripheral device in a predictable manner. This fosters more-robust and reliable security circuitry.