Question

Propose an OFB mode scheme that encrypts one byte of plaintext at a time, e.g., for encrypting keystrokes from a remote keyboard. The block cipher used is AES. Perform one block cipher operation for every new plaintext byte. Draw a block diagram of your scheme and pay particular attention to the bit lengths used in your diagram.

Answer 1

`Hey,

Note: Brother if you have any queries related the answer please do comment. I would be very happy to resolve all your queries.

Below is an OFB scheme which matches the requirements:

128 128 AES S; AES 128 128 128 ĐA X 8

Kindly revert for any queries

Thanks.