Those apps (with the exception of Weibo) are made for keeping secrets. Surely, if the spooks at the CIA could get around those apps's safeguards, then the privacy of millions of activists, dissidents, journalists, and everyday people who prefer secure communications would be in jeopardy. Right? After all that threat was at the center of former NSA contractor Edward Snowden's revelations in 2013: a vast wealth of data about individuals, Hoovered en masse, indiscriminately. No one was safe.