The next mode of operation, which is probably one of the most used is CBC, cipher Block Chaining. And in this mode, we are adding complexity. We are splitting our plain file or text into chunks with the same size blocks as before. But then we choose an IV initialization vector, which is a random value that we use. And now we do the following. We take our plaintext and we saw it remember, we saw it with our IV, we add up the ones and the zero together.

And then we encrypted using the same key and the algorithm and we get our first block cipher. For the next plain text, we do the same. We take the cipher text from the previous. And again we saw it with the plain text ending cryptic using the same algorithm and the same key