In the "Introduction to Cryptography: With Coding Theory" by Trappe and Washington, in the chapter about OFB (Output Feedback) mode the authors say that:
The OFB mode produces a bit stream and it encrypts similarly to the LFSR(Linear-feedback shift register) method. The differences are that LFSR is faster, but OFB is more secure.
I don't understand why OFB operates as a LFSR. The author does not mention it. Can you explain to me ?