Hot answers tagged authentication
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Regarding GCM mode and the uniqueness of the nonce, it should be noted that EAX mode and OCB mode also require unique nonces. One potential problem EAX mode has, which neither GCM or CCM have, is that it is hard to implement it in such way that you can guarantee that the probability of nonce collisions is zero; only that it is acceptably low. OCB mode has ...
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In entity authentication, the parties do not necessarily exchange a session key, but authenticate to each other by providing some proof related to their identites. For instance, if one party signs a challenge given by its partner, this party proves its identity.
Implicit key authentication merely guarantees that the partner (with whom you are talking right ...
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