Self-Composition Deviation (SCD)
Concept**Self-Composition Deviation (SCD)** is a security-oriented coverage metric for coverage-guided hardware fuzzing. It was introduced as part of a methodology called **coverage-guided hardware-software contract fuzzing**, which targets violations of hardware-software leakage contracts in processor designs.[^b91069a9]
First seen 5/24/2026
Last seen 5/26/2026
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Self-Composition Deviation (SCD)
Self-Composition Deviation (SCD) is a security-oriented coverage metric for coverage-guided hardware fuzzing. It was introduced as part of a methodology called coverage-guided hardware-software contract fuzzing, which targets violations of hardware-software leakage contracts in processor designs.[1]
Overview
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2 connections Coverage-Guided Pre-Silicon Fuzzing of Open-Source Processors based on Leakage Contracts ← introduces 100% 2e
The paper introduces SCD as a new security-oriented coverage metric.
The technique uses SCD as its core coverage metric to guide exploration of leakage contract violations.