Using the Paris attack to justify stepping up the intrusiveness of state surveillance, UK Prime Minister David Cameron is calling for and end to any communication that the government is unable to read with a simple warrant signed by the home secretary. Leo says that this can't happen. The US even tried to prevent strong encryption by classifying it as munitions, and it just didn't work because it's really easy to create strong encryption.
Leo says that using WhatsApp, Apple's iMessages, and GPG for email will guarantee you have encrypted communications. And open source is best because you can look at the code to see if there's any governmental backdoors.