Tamper Detection Device System for Hardware Security
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Solution Overview
Problem
Devices are vulnerable to physical tampering, which can compromise proprietary information, as existing technologies lack effective mechanisms to detect and prevent unauthorized access or changes to their hardware.
Innovation Solution
A tamper detection device (TDD) system that includes sensors to detect tampering events, generating a tamper value which is compared to a preset value stored in memory, and a control circuit that disables functions or logs tampering attempts, using a processor and memory to manage tamper values and prevent unauthorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tamper detection devices are added to detect physical tampering, then security against unauthorized access is improved, but device complexity increases
Solution Approach 1:
The tamper detection system is divided into multiple independent tamper detection devices (TDDs), each monitoring specific physical parameters. Each TDD operates independently and reports to a central circuit, allowing modular implementation and reduced overall complexity while maintaining comprehensive security coverage.
Solution Approach 2:
A tamper detection circuit serves as an intermediary between the tamper detection devices and the main processor. This intermediary circuit aggregates data from multiple TDDs and manages tamper value comparisons, reducing the processing burden on the main system while maintaining effective security monitoring.
2Reliability
If multiple tamper detection devices are used to monitor different aspects of hardware integrity, then detection capability is improved, but measurement precision requirements increase
Solution Approach 1:
Different tamper detection devices monitor different physical parameters (temperature, humidity, pressure, motion) and convert these into tamper values. The system compares these values against预设 thresholds rather than requiring high-precision continuous measurement, allowing reliable detection with simpler measurement requirements.
Solution Approach 2:
The system continuously monitors tamper values from multiple devices and provides feedback to the control circuit. When a tamper value exceeds its threshold, the system triggers appropriate responses. This feedback mechanism allows the system to adapt to changing conditions without requiring continuously high-precision measurements.
Data Source
AI summary
Systems or methods can be used to detect evidence of tampering. The tampering can be physical tampering, such as the turning of a screw, or removal or modification of an electronic component. In some examples, a tamper detection value can be determined from a tamper detection device and compared to a predetermined tamper detection value to determine if tampering is indicated. The system can, upon detection of the tampering, halt an operation, disable device or circuit functionality, disable future operations, physically disable a device, or any combination thereof.