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Actually, s is in CFB mode to handle transmission channels for the encrypted data that can add or drop individual bytes. In the olden times (say, the 70's), it was common to transmit data over serial channels, for example, RS-232. These channels were not perfect, and one common error we see is that if the transmitter sent 7 bytes, the receiver might get ...


I don't consider the following a complete answer, but it is a start, and best I can do with my very limited knowledge. I hope someone could fix it or improve it. These type of attacks are only possible against specific implementation of higher level protocols. I will start by describing an invalid-curve attack against a specific ECDH based protocol. ...

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