Voltage Attack Detection Circuit for Multi-Range Glitch Protection
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Solution Overview
Problem
Current voltage attack protection solutions for chips are incomplete and unreliable, as they primarily focus on detection rather than comprehensive protection across all power domains, leaving blind spots and failing to account for varying attack durations and strengths.
Innovation Solution
A voltage attack detection circuit is introduced, comprising voltage sensors and glitch sensors that differentiate between types of voltage attacks based on duration and strength, enabling targeted protective measures for each power domain, thereby providing comprehensive and reliable protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single voltage attack protection solution is implemented, then the protection covers a specific voltage attack scenario, but it leaves protection blind spots for other attack scenarios with different durations and strengths
Solution Approach 1:
The patent segments the voltage attack protection into multiple independent detection circuits, each specialized for a specific attack scenario (duration and strength range). This segmentation allows each circuit to be optimized for its specific scenario while collectively providing comprehensive coverage across all possible attack vectors, resolving the contradiction between reliability for a specific scenario and adaptability across multiple scenarios.
Solution Approach 2:
The patent implements dynamic adaptability by configuring different detection circuits with varying sensitivity thresholds and detection parameters matched to specific attack characteristics. The system dynamically selects and activates appropriate detection circuits based on the detected attack pattern, enabling the protection system to adapt to different attack scenarios rather than using a static single-threshold approach.
2Reliability
If voltage attack detection is implemented across all power domains, then comprehensive protection is achieved, but the device complexity increases
Solution Approach 1:
The patent applies local quality by implementing detection circuits with specialized characteristics tailored to the specific requirements of each power domain. Each detection circuit is configured with local optimization parameters (thresholds, sensitivity, detection ranges) that match the specific vulnerability profile and operational characteristics of its associated power domain, rather than using a uniform approach across all domains.
Solution Approach 2:
The patent achieves universality through modular detection circuit design that can be replicated and configured across multiple power domains. The same basic detection circuit architecture serves multiple functions by being instantiated differently for each power domain, providing comprehensive protection without proportionally increasing overall system complexity through standardized modular components.
Data Source
AI summary
A voltage attack detection circuit includes at least one voltage regulation circuit, at least one voltage sensor and at least one glitch sensor. The at least one voltage sensor is configured to receive at least one first voltage output by the at least one voltage regulation circuit respectively, and output at least one first signal respectively. The at least one first signal is configured to indicate whether it is under voltage attack of a duration in a first range and an attack strength in a second range respectively. The at least one glitch sensor is configured to receive at least one first voltage respectively, and configured to output at least one second signal respectively. The at least one second signal is configured to indicate whether it is under voltage attack of a duration in a third range and an attack strength in a fourth range.