Recent disclosures about the bulk collection of domestic phone call records and other signals intelligence programs have stimulated widespread debate about the implications of such practices for the civil liberties and privacy of Americans. In the wake of these disclosures, many have identified a need for the intelligence community to engage more deeply with outside privacy experts and stakeholders. At the request of the Office of the Director of National Intelligence, the National Academies of Sciences, Engineering, and Medicine convened a workshop to address the privacy implications of emerging technologies, public and individual preferences and attitudes toward privacy, and ethical approaches to data collection and use. This report summarizes discussions between experts from academia and the private sector and from the intelligence community on private sector best practices and privacy research results. Table of Contents Front Matter 1 Overview 2 Workshop Introduction 3 Privacy Implications of Emerging Technologies Part I - Panel Summary 4 Privacy Implications of Emerging Technologies Part II - Panel Summary 5 Social Science and Behavioral Economics of Privacy - Panel Summary 6 Best Practices and Ethical Approaches for Data Collection and Use - Panel Summary 7 Wrap-Up - Panel Summary Appendix A: Workshop Statement of Task Appendix B: Workshop Agenda Appendix C: Biographical Sketches Appendix D: Acronyms and Abbreviations