IC Breach Detection via Power Grid Current Monitoring
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Solution Overview
Problem
Integrated circuits (ICs) storing sensitive information are vulnerable to unauthorized access through micro-probing, as existing protection methods like static wire-meshes can be bypassed by hackers.
Innovation Solution
A power grid with distributed nodes over sensitive regions of ICs monitors power integrity, detecting breaches by floating nodes or voltage changes, triggering breach-detection circuitry to respond with actions such as data erasure or alert generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If static wire-meshes are used to protect ICs from micro-probing, then detection capability is improved, but the protection can be bypassed by hackers who can short and cut wire segments
Solution Approach 1:
The patent changes the detection parameter from static voltage (in wire-mesh) to dynamic current monitoring. By placing current sensing elements at strategic locations within the power grid and monitoring current flow patterns, the system detects breaches through abnormal current changes rather than voltage presence, making it impossible for attackers to bypass by simply shorting or cutting wires.
Solution Approach 2:
The patent introduces current sensing elements as intermediary components between the power grid and the detection logic. These sensing elements act as mediators that convert physical breach events into detectable current signal changes, providing indirect but reliable detection that cannot be easily fooled by direct wire manipulation.
2Measurement precision
If multiple nodes are distributed over sensitive regions for monitoring, then detection precision is improved, but device complexity increases
Solution Approach 1:
The patent makes the power grid serve multiple functions simultaneously: it continues to provide power distribution while also serving as the detection network through embedded current sensing elements. This eliminates the need for separate dedicated sensing structures, reducing overall device complexity while maintaining high detection precision through distributed monitoring.
Solution Approach 2:
The patent merges the power distribution function and the breach detection function into a single integrated system. By combining current-carrying power lines with current sensing capabilities at key locations, the system achieves both power delivery and high-precision breach detection without requiring separate independent structures.
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
Effectively prevents unauthorized access to ICs by masking sensitive regions and detecting tampering attempts, ensuring the security of stored data without increasing current drops or active signals.
Implementation Method 1
a power grid to distribute power to circuitry of an IC using a plurality of nodes distributed over at least one sensitive region of the IC
Implementation Method 2
An event indicative of breach (e.g., tampering) by an external probe can be detected at a portion of the at least one sensitive region responsive to a floating node detection or a change in voltage at one of the plurality of nodes
Data Source
AI summary
An apparatus embodiment includes an integrated circuit (IC) and breach-detection circuitry. The IC includes data storage circuitry, a power grid configured to distribute power to the data storage circuitry, and a plurality of nodes distributed over at least one sensitive region of the IC. The breach-detection circuitry monitors power grid integrity at the at least one sensitive region of the IC and detects an event indicative of a breach by an external probe at a portion of the at least one sensitive region in response to floating node detection or a change in voltage at one of the plurality of nodes.