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However, the last variant has the advantage (at least in my opinion) that the condition The IV of the encryption is required for decryption is eliminated. It isn't really. It's just generated ...
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#1: Initial revision
> However, the last variant has the advantage (at least in my opinion) that the condition *The IV of the encryption is required for decryption* is eliminated. It isn't really. It's just generated less efficiently: instead of generating a random IV, the sender has to generate a random IV and do one block's worth of encryption to get the *real* IV.