Answering the question: "What are digital signatures, and how do they assure message integrity?" This video includes message integrity, digital signatures, and endpoint authentication. Based on Computer Networking: A Top-Down Approach 8th edition, Chapter 8, Sections 3 and 4. Slides are copyright 1996-2020 J.F. Kurose, K.W. Ross All Rights Reserved., and freely available here: Background music: