And don’t think that the data being collected by autocracies is limited to Facebook posts or Twitter comments. The most important data they will collect in the future is biometric information, which can be used to identify individuals through their unique physical and biological attributes. Fingerprints, photographs and DNA testing are all familiar biometric data types today. Indeed, future visitors to repressive countries might be surprised to find that airport security requires not just a customs form and passport check, but also a voice scan. In the future, software for voice and facial recognition will surpass all the current biometric tests in terms of accuracy and ease of use.