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Wireless & Mobility · Intermediate

Forward Secrecy

A property ensuring that compromise of a long-term secret does not expose past session keys.

Definition

In Wi-Fi, WPA3-SAE and OWE provide forward secrecy, unlike WPA2-PSK where knowing the passphrase plus a captured handshake decrypts traffic. Forward secrecy relies on ephemeral key exchange. It is also known as perfect forward secrecy.

Exam tip

WPA2-PSK lacks forward secrecy; WPA3-SAE has it.

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