"When Glenn Greenwald discovered last year that some of the NSA documents he'd received from Edward Snowden had been corrupted, he needed to retrieve copies from fellow journalist Laura Poitras in Berlin. They decided the safest way to transfer the sizable cache was to use a USB drive carried by hand to Greenwald's home in Brazil. As a result, Greenwald’s partner David Miranda was detained at Heathrow, searched, and questioned for nine hours.

That's exactly the sort of ordeal Micah Lee, the staff technologist and resident crypto expert at Greenwald’s investigative news site The Intercept, hopes to render obsolete."