https://necessaryandproportionate.org/ Necessary & Proportionate The International Principles on the Application of Human Rights to Communications Surveillance (the “Necessary and Proportionate Principles” or “13 Principles”) show how existing human rights law applies to modern digital surveillance. Drafted by a global coalition of civil society, privacy and technology experts in 2013, they have been endorsed by over 600 organizations and over 270,000 individuals worldwide.