EAP-FAST
Comparing the various methods, the EAP-FAST mechanism is the most comprehensive and secure WLAN scheme. LEAP was proven to be susceptible to dictionary attacks, and EAP-FAST is preferable to LEAP. In short, EAP-FAST is hardened LEAP with better crypto protecting the challenge/response mechanism.
EAP-FAST not only mitigates risks from passive dictionary attacks and man-in-the-middle (MitM) attacks, it also enables secure authentication based on currently deployed infrastructure. In addition, EAP-FAST minimizes the hardware requirement; many of the mechanisms require computational burden at the edge devices for asymmetric cryptography and certificate validation. As you have seen from your experience, secure-but-difficult-to-deploy mechanisms ...
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