Snowden's revelations exposed the breadth and scale of NSA's surveillance and likely contributed to the NSA losing a significant portion of its capabilities (Matthew Green/A Few Thoughts ...)

Matthew Green / A Few Thoughts on Cryptographic Engineering:
Snowden's revelations exposed the breadth and scale of NSA's surveillance and likely contributed to the NSA losing a significant portion of its capabilities  —  Edward Snowden recently released his memoirs.  In some parts of the Internet, this has rekindled an ancient debate: namely, was it all worth it?