Since June, news reports based on documents leaked by former National Security Agency contractor Edward Snowden have revealed the depth and breadth of NSA surveillance activities. The NSA scandal’s many dimensions include: mass domestic surveillance of telephone call information; allegations that officials deceived Congress, the courts, and the public about the nature of the NSA’s programs; alleged access to the Internet’s backbone and the traffic of major Internet companies; and systematic efforts to undercut the use of the encryption that secures communications and financial information.