In a 3 party based authentication protocol clients A, B and an authentication server S participate. S generates a session key for secure communication between A and B at their request. Some principals, e.g. S, notice the on line attack and log it to stop further attempts. However it is believed that these two requirements needn t be achieved to design a protocol withstanding off line guessing attacks. We will demonstrate the importance of achieving these requirements to design protocols, which are resistant to undetectable on line guessing attacks in section 4.
Enclaves provides an abstract layer of secure multicast.
For each group session, different keys are distributed to members for encrypting multicast data. Optimal Authentication Protocols Resistant to Password Guessing Attacks . It was conjectured that protecting passwords from guessing attacks would make a protocol inherently more expensive. Optimal Authentication Protocols Resistant to Password Guessing Attacks .