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4

Most likely, the hardware engine has an API accepting an IV of 256 bits (32 bytes) and a data block of some size multiple of 512 bits (64 bytes), and returns a result of 32 bytes. Given that SHA-256 is a Merkle-Damgård hash, in order to chain invocations of that API, you want to pass the SHA-256 IV (given by FIPS 186-4 section 5.3.3) as the IV of the first ...


2

Would it be useful for companies who need to keep their data safe? Not exactly. The One-Time-Pad is extremely inconvenient. If your client has to encrypt a piece of plaintext that's 4GB large, then they will not only have to generate 4GB of random data, they also will have to share that pad with the receivers of that message, making it a total of 8GB of ...



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