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Security Fundamentals & Crypto · Intermediate

Extensible Authentication Protocol-Transport Layer Security (EAP-TLS)

EAP method using mutual certificate authentication between client and server.

Definition

EAP-TLS requires certificates on both the authentication server and each client, providing strong, phishing-resistant authentication without passwords. It is considered the most secure common EAP method but requires PKI to issue and manage client certificates. EAP-TLS 1.3 is defined in RFC 9190.

Example

Domain laptops auto-enroll machine certificates and authenticate to corporate Wi-Fi with EAP-TLS.

Exam tip

EAP-TLS = client and server certificates; most secure and most PKI effort.

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