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The "encryption" step is what makes EKE a Password Authenticated Key Exchange algorithm; the low entropy shared secret (the password) can be tolerated precisely because of that step. Note that it is a special encryption; we are not talking about something like AES here. The idea can be roughly expressed in the following terms: There is a base, ...


5

Your description is a bit confused and appears to be wrong. In particular, we see Alice computing here Diffie-Hellman half gKA and then proceed to send... her Diffie-Hellman secret KA to Bob, which is not at all what she should do. Plain Diffie-Hellman works the following way: Alice generates (randomly) her secret KA and computes gKA. Bob generates ...


0

is there any way to both sides share a secret key and then generates key pairs using it You can derive further keys from an initial shared key, there are various key derivation mechanisms that would allow you to do this, but you still have the problem of distributing the initial key. Anyone who intercepts this key could replicate the derivation process ...



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