privacyandtechnology:

From the Abstract:

“This paper explains how changing technology, especially the rising adoption of encryption, is shifting law enforcement and national security lawful access to far greater emphasis on stored records, notably records stored in the cloud. […] Part 1 of the paper describes the changing technology of wiretaps and government access. Part 2 documents the growing adoption of strong encryption in a wide and growing range of settings of interest to government agencies. Part 3 explains how these technological trends create a major shift from real-time intercepts to stored records, especially in the cloud.”