The Secret War of the Internet!
One of the most significant technologies being targeted by the intelligence services is encryption.
Online, encryption surrounds us, binds us, identifies us. It protects things like our credit card transactions and medical records, encoding them so that - unless you have the key - the data appears to be meaningless nonsense.
Encryption is one of the elemental forces of the web, even though it goes unnoticed and unremarked by the billions of people that use it every day.
But that doesn't mean that the growth in the use of encryption isn't controversial.
For some, strong encryption is the cornerstone of security and privacy in any digital communications, whether that's for your selfies or for campaigners against an autocratic regime.
Others, mostly police and intelligence agencies, have become increasingly worried that the absolute secrecy that encryption provides could make it easier for criminals and terrorists to use the internet to plot without fear of discovery.
As such, the outcome of this war over privacy will have huge implications for the future of the web itself.