Networking / Beginners


The EAP Pre-Shared Key authentication protocol, like the other EAP types discussed thus far, can be used for providing authentication services to entities in a wireless network.

The Pre-Shared Key refers to a key or secret that needs to be derived and shared by the parties by some mechanism before the EAP-PSK conversation takes place. The security provided by EAP-PSK will be compromised if this secret key is exposed. Note that EAP-PSK is different from the Pre-shared Key authentication mode used in Wi-Fi Protected Access (WPA). The WPA implementation is commonly known as WPA-PSK.

EAP-PSK is a simpler in its design and in the way it functions when compared to EAP-TLS or EAP-TTLS. This simplicity is due to the fact that it does not use asymmetric cryptography as the other two do. This same simplicity also means that EAP-PSK cannot offer some of the advanced security features of the others.

Under the hood, EAP-PSK uses the AES symmetric block cipher.

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