Multi-Domain Voltage Attack Detection Circuit With Deglitch Filtering
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing security chips are vulnerable to voltage attacks, which can cause abnormal operations and expose sensitive information, highlighting the need for comprehensive protection across all power domains within the chip.
Innovation Solution
A voltage attack detection circuit is implemented, comprising voltage regulation circuits and sensors that convert and monitor supply voltages, generating signals to indicate whether voltages are within a preset range, and includes a deglitch circuit to prevent false alarms, ensuring accurate detection and protection against voltage attacks across the entire power domain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If voltage sensors are added to monitor supply voltages in each power domain, then voltage attack detection capability is improved, but device complexity increases
Solution Approach 1:
The chip is divided into multiple independent power domains, each with its own voltage regulation circuit and voltage sensor. This segmentation allows targeted monitoring of each power domain without requiring a single complex monitoring system for the entire chip, thus improving detection capability while managing complexity through modular design.
Solution Approach 2:
The voltage sensor is designed as a multi-functional component that can detect voltage levels, determine whether voltages are within preset ranges, and generate indication signals. This universal design reduces the need for separate detection circuits for different functions, improving reliability while avoiding unnecessary complexity.
2Measurement precision
If the preset voltage range is set narrowly to improve detection accuracy, then measurement precision is improved, but false alarm rate increases
Solution Approach 1:
The system allows dynamic adjustment of the preset voltage range parameters. By optimizing the voltage thresholds based on actual operating conditions and requirements, the system achieves a balance between detection accuracy and false alarm rate, avoiding both overly narrow ranges that cause false alarms and overly wide ranges that reduce precision.
Solution Approach 2:
The voltage sensor generates indication signals that provide feedback about voltage status. This feedback mechanism allows the system to monitor voltage conditions continuously and adjust detection parameters accordingly, improving measurement precision while reducing false alarms through adaptive response to actual voltage conditions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces the probability of false alarms and ensures accurate voltage attack detection, providing robust protection against voltage attacks, thereby enhancing the security and reliability of the chip's operations.
Implementation Method 1
each voltage sensor of the at least one voltage sensor is configured to output a first signal based on received reference voltage and received first voltage
Implementation Method 2
the at least one voltage regulation circuit is configured to convert the external supply to at least one internal supply
Data Source
AI summary
A voltage attack detection circuit includes: at least one voltage regulation circuit, where the at least one voltage regulation circuit is connected to an external supply respectively, the at least one voltage regulation circuit is configured to convert the external supply to at least one internal supply, and the at least one internal supply is configured to output at least one first voltage respectively; at least one voltage sensor, where the at least one voltage sensor is connected to the at least one internal supply respectively, so as to receive the at least one first voltage respectively, each voltage sensor of the at least one voltage sensor is configured to output a reference voltage based on a received reference voltage and a received first voltage, the reference voltage is configured to indicate whether a received first voltage is within a present voltage range.