A value-packed two-book set that combines the best of engineering dependable and secure software systems with the best in-depth look at physical lock security and insecurity In Security Engineering: A Guide to Building Dependable Distributed Systems, Cambridge University professor Ross Anderson updates his classic textbook and teaches readers how to design, implement, and test systems to withstand both error and attack.  Now the latest edition brings it up to date for 2020. As people now go online from phones more than laptops, most servers are in the cloud, online advertising drives the Internet and social networks have taken over much human interaction, many patterns of crime and abuse are the same, but the methods have evolved. Ross Anderson explores what security engineering means in 2020, including: * How the basic elements of cryptography, protocols, and access control translate to the new world of phones, cloud services, social media and the Internet of Things * Who the