Privacy is the subjective condition that people experience when they have power to control information about themselves. While the law can play a vital role in giving full effect to the Fourth Amendment's restraint on government surveillance, privacy is not something that can simply be created or enforced by regulation. Because everyone has different preferences regarding what information they’re willing to disclose, only they themselves can protect their privacy online. Furthermore, the ongoing evolution of the Internet, shifting expectations about online interaction, and the constant revelations of new security vulnerabilities all make it impossible to simply freeze the Internet in place. Our goal in creating this series is to educate people about the tools that simplify the task of protecting one’s privacy and security online.