Chapter 6 is block ciphers, Chapter 7 is stream ciphers.
Also, the first lines in chapter 7:
Let’s try to build a stream cipher using the tools we already have. Since we already have block ciphers, we could simply divide an incoming stream into different blocks, and encrypt each block...
Also, the first lines in chapter 7: Let’s try to build a stream cipher using the tools we already have. Since we already have block ciphers, we could simply divide an incoming stream into different blocks, and encrypt each block...