Welcome to the website of the Institute of Information Security at ETH Zurich. Information Security is both a problem of fundamental importance for modern society and a scientific discipline with its own foundations and methods. The institute carries out research across this spectrum, ranging from mathematical foundations of cryptography to building solutions to pressing problems in securing networks, cyber-physical systems, and applications. As security is highly interdisciplinary, work is collaborative, with strong links to industrial partners and other faculty areas. The security iinstitute has a track record of impact through publications at top venues, open source software releases, products, and spin-off companies.