Key Offset Attack Sample Clauses

Key Offset Attack. In this attack an adversary modifies the message being sent by multiplying the Ephemeral Public Key with its own exponent λ. This offsets the agreed session key by the same exponent unknown to either of the parties. This happens in protocols where key confirmation is absent. In the protocol proposed by Farash and Attari, the absence of origin authentication causes a vulnerability. The same is remedied in our protocol by adding an extra term in the message being sent. The extra term is effectively a Xxxxxxx signature of the original terms being sent. The signature is verified in the correctness check of Step 4 in Algorithm 1. For an active adversary to successfully mount the attack in this model, it should have the ability to generate a new signature on the message being sent. This cannot be achieved as the signature generation involves the long term secret key of the user, which the adversary is unaware of.
Sample 1
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Related to Key Offset Attack

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