Decoy Electromagnetic Signal Generation for Integrated Circuit Security
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Solution Overview
Problem
Integrated circuits are vulnerable to side channel analysis, particularly electromagnetic signal analysis, which can reveal operational information and data manipulation, necessitating protection against such analyses.
Innovation Solution
A method and device are proposed to create a decoy electromagnetic signal simulation by generating a pseudo-random decoy electric signal from a module's operation and circulating it through an antenna located at a different substrate zone, making it difficult to deduce the module's operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electromagnetic signals are emitted to simulate module operation, then security against side channel analysis is improved, but device complexity increases due to additional antennas and signal generation components
Solution Approach 1:
The patent creates a decoy electromagnetic signal that copies the characteristics of the module's operational signal. The decoy signal is generated by capturing the module's electrical signal and re-emitting it through an antenna at a different location, making it appear as though the module is operating when it is actually in standby mode. This copying approach provides security without requiring complex signal generation circuits.
Solution Approach 2:
The patent introduces an intermediary system consisting of signal capture circuits, processing logic, and transmission antennas that mediate between the module and the external electromagnetic environment. This intermediary layer decouples the module's actual operation from its electromagnetic signature, protecting the module while managing the complexity through modular design.
2Measurement precision
If a decoy signal is generated using pseudo-random delays, then measurement precision of electromagnetic analysis is worsened, but loss of time occurs during signal generation and processing
Solution Approach 1:
The patent applies pseudo-random delays to the decoy signal in advance of any potential analysis attempt. By pre-processing the signal with randomization delays, the system ensures that any electromagnetic analysis will encounter already-degraded precision, while the actual module operation proceeds without time loss since the decoy is generated independently.
Solution Approach 2:
The system periodically updates the pseudo-random delay parameters and recaptures module signals to maintain the decoy's effectiveness. This periodic refresh ensures measurement precision degradation remains consistent over time without requiring continuous real-time processing that would cause time loss.
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
This approach significantly complicates the analysis of electromagnetic signals, making it harder to infer the module's operations by introducing pseudo-random delays and signal variations, thereby enhancing the circuit's security against side channel attacks.
Implementation Method 1
a circulation of said at least one electrical decoy signal in said at least one first antenna so as to generate at least one electromagnetic decoy radiation
Data Source
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Figure 5~6
AI summary
integrated circuit, comprising at least one module (CRY) located in at least one first zone (Z1) of a semiconductor substrate (1) of the integrated circuit (IC), and at least one decoy cell (CEL1) having at least one first antenna (5) above at least one second zone (Z2) of the integrated circuit, different from said at least one first zone (Z1), generation means (4) configured to generate at least one electrical decoy signal (SE) from at least one first electrical signal (S) characteristic of an operation of said at least one module (CRY) and at least one pseudo-random parameter, and to circulate said at least one electrical decoy signal in said at least one first antenna so as to generate at least one electromagnetic decoy radiation.