Lecture 4: Stream Ciphers and Linear Feedback Shift Registers by Christof Paar
Introduction to Cryptography by Christof Paar · 89:39
This lecture introduces linear feedback shift registers (LFSRs). They are cheap hardware circuits that generate keystream for stream ciphers, which is why GSM's A5/1 is built from them. A well-designed LFSR produces e...