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Wireless & Mobility · Advanced

Galois/Counter Mode Protocol (GCMP)

An AES-based authenticated encryption protocol for Wi-Fi, used as GCMP-256 in WPA3-Enterprise 192-bit and Wi-Fi 7.

Definition

GCMP was introduced with 802.11ad for efficient high-speed encryption and uses Galois/Counter Mode. GCMP-256 is required for WPA3-Enterprise 192-bit mode and is used by Wi-Fi 7 MLO with newer AKMs. It provides confidentiality and integrity in one pass.

Exam tip

192-bit mode requires GCMP-256, not CCMP-128.

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