From the Document: "Changing technology presents opportunities and challenges for U.S. law enforcement. Some technological advances have arguably opened a treasure trove of information for investigators and analysts; others have presented unique hurdles. While some feel that law enforcement now has more information available to them than ever before, others contend that law enforcement is 'going dark' as their investigative capabilities are outpaced by the speed of technological change. These hurdles for law enforcement include strong, end-to-end (or what law enforcement has sometimes called 'warrant-proof') encryption; provider limits on data retention; bounds on companies' technological capabilities to provide specific data points to law enforcement; tools facilitating anonymity online; and a landscape of mixed wireless, cellular, and other networks through which individuals and information are constantly passing. As such, law enforcement cannot access certain information they otherwise may be authorized to obtain. Much of the current debate surrounds how strong encryption contributes to the going dark issue, and thus it is the focus of this report."
CRS Report for Congress, R44481
Congressional Research Service: https://crsreports.congress.gov/