The right to privacy is an element of various legal traditions that intends to restrain governmental and private actions that threaten the privacy of individuals. Over 150 national constitutions mention the right to privacy. On 10 December 1948, the United Nations General Assembly adopted the Universal Declaration of Human Rights (UDHR), originally written to guarantee individual rights of everyone everywhere; while right to privacy does not appear in the document, many interpret this through Article 12, which states: "No one shall be subjected to arbitrary interference with his privacy, family, home or correspondence, nor to attacks upon his honour and reputation. Everyone has the right to the protection of the law against such interference or attacks."

Since the global surveillance disclosures of 2013, initiated by ex-NSA employee Edward Snowden, the right to privacy has been a subject of international debate. Government agencies, such as the NSA, FBI, CIA, R&AW and GCHQ, have engaged in mass, global surveillance. Some current debates around the right to privacy include whether privacy can co-exist with the current capabilities of intelligence agencies to access and analyze many details of an individual's life; whether or not the right to privacy is forfeited as part of the social contract to bolster defense against supposed terrorist threats; and whether threats of terrorism are a valid excuse to spy on the general population. Private sector actors can also threaten the right to privacy – particularly technology companies, such as Amazon, Apple, Meta, Google, Microsoft, and Yahoo that use and collect personal data. These concerns have been strengthened by scandals, including the Facebook–Cambridge Analytica data scandal, which focused on psychographic company Cambridge Analytica which used personal data from Facebook to influence large groups of people.