8. We introduced in our lecture that AES encrypts a block size of 128 bits plaintext at a time, however, the plaintext message in practical scenarios is usually of arbitrary length. How could AES encrypt a message that is longer than the block size or of arbitrary length? Please search online by yourself about how AES deals with this and explain the ECB and CBC modes of AES encryption, you may use Please note: all the answers need to be typed/written in your own words. EE 458/558 Hardware Security and Trust, Spring 2021 images in your answer to help with your explanation