Susan Landau is Bridge Professor in Cyber Security and Policy at The Fletcher School and the School of Engineering, Department of Computer Science, Tufts University and Visiting Professor, Department of Computer Science, University College London. Landau works at the intersection of cybersecurity, national security, law, and policy. Landau's new book, People Count: Contact-Tracing Apps and Public Health, will be published in April 2021. She has also written extensively on cryptography policy, wiretapping, and surveillance, and has testified before Congress and frequently briefed US and European policymakers on encryption, surveillance, and cybersecurity issues.