Ross Anderson was an inventor of API attacks on cryptographic processors, semi-invasive attacks on smartcards, distortion attacks on copyright marking systems and fast correlation attacks on various stream ciphers. On the constructive side of things, he was one of the inventors of the AES finalist block cipher, Serpent; of the steganographic file system; of soft tempest; and (via the Eternity Service) or peer-to-peer systems. On the academic front he pioneered the study of security economics, studying systems that fail because of misaligned incentives, and leads a project researching the psychology of deception. He wrote the definitive book 'Security Engineering A Guide to Building Dependable Distributed Systems.'