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Microarchitectural State Divergence

Concept

**Microarchitectural state divergence** is a security-analysis concept in which differences in the internal microarchitectural state of a processor are used to make information leakage observable during hardware testing. In the context of hardware-software leakage contracts, it is used as the observable signal in a **self-compositional** fuzzing framework for detecting contract violations in processor designs.[^b91069a9]

First seen 5/24/2026
Last seen 5/26/2026
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Microarchitectural State Divergence

Microarchitectural state divergence is a security-analysis concept in which differences in the internal microarchitectural state of a processor are used to make information leakage observable during hardware testing. In the context of hardware-software leakage contracts, it is used as the observable signal in a self-compositional fuzzing framework for detecting contract violations in processor designs.[1]

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