To what extent are security agencies accessing our communications and other data? * In this video, RALF POSCHER proposes and explains a mechanism by which we can answer this question. Poscher outlines how we can go about constructing a surveillance barometer. * This would reveal a society’s surveillance score based on the amount and the intensity of surveillance activities undertaken by security agencies. Providing helpful insight also for legislators and the general public, the barometer’s remit also has the potential to be extended to a supra-national level, e.g. the European Union. * This LT Publication is divided into the following chapters: 0:00 Question 2:02 Method 6:18 Findings 7:41 Relevance 9:40 Outlook