Processor Power Supply Glitch Detection Circuitry
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Solution Overview
Problem
Payment terminals are vulnerable to glitch attacks, where attackers attempt to induce unanticipated conditions to access or manipulate processor operations, leading to fraudulent transactions and data breaches.
Innovation Solution
Incorporating glitch detection and mitigation circuitry within the payment terminal's power conversion circuitry, which monitors power supply components for anomalies, generates a glitch indicator, and executes corrective actions such as delaying operations or disabling components to prevent unauthorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If glitch detection circuitry is added to monitor power supply components, then security against fraudulent transactions is improved, but device complexity increases
Solution Approach 1:
The patent combines glitch detection functionality with existing power conversion circuitry by having the processor monitor its own power supply voltage. The processor executes instructions to detect voltage anomalies and generate glitch indicators, merging security monitoring into the existing power management infrastructure rather than adding separate dedicated detection hardware.
Solution Approach 2:
The processor performs self-monitoring of its own power supply voltage conditions. By having the processor detect glitches in its own power supply and generate corresponding indicators, the system eliminates the need for external monitoring components, reducing overall device complexity while maintaining security functionality.
2Reliability
If corrective actions are executed to mitigate glitch attacks, then reliability is improved, but loss of time occurs due to operational delays
Solution Approach 1:
The system generates glitch indicators in advance when voltage anomalies are detected, before executing corrective actions. This preliminary detection and indication allows the system to prepare for potential security threats, enabling faster response when actual glitch attacks are confirmed, thereby reducing operational delays while maintaining reliability.
Data Source
AI summary
A transaction device includes circuitry that provides a power supply to a processor of the transaction device. Attackers may attempt to glitch the processor power supply in a manner that causes processor to operate incorrectly such as by skipping instructions. A monitoring circuit may be coupled to the processor power supply circuitry to identify conditions that are indicative of a glitch attempt. Glitch attempts may be stored in a memory and reported to the processor to induce the execution of counter-measures.