Block cipher mode of operation
In cryptography, a block cipher mode of operation is an algorithm that uses a block cipher to provide information security such as confidentiality or authenticity. A block cipher by itself is only suitable for the secure cryptographic transformation (encryption or decryption) of one fixed length group of bits called a block. A mode of operation describes how to repeatedly apply a cipher's ...
block diagram 4 bit full adder Gallery
patent ep0764300b1 alternating polarity carry look ahead
4 bit ripple carry adder truth table