Improved Extensible Authentication Protocol Using Only a Password

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Last updated 2020-01-25 (latest revision 2019-07-24)
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Passwords are a popular form of credential for user authentication. EAP-pwd (RFC 5931) is a popular method of performing secure password authenticaiton. EAP-pwd requires a secret element in a finite cyclic group, unfortunately the technique it uses to derive this secret is open to timing and cache attacks. This improved version, EAP-pwd', uses a different technique to derive the secret element which is resistant to timing and cache attacks.


Dan Harkins (

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