Utilize the input text as a context reference, choose the right relationship between Edward Snowden and National Security Agency from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.
Text: The case was initiated by Austrian activist Max Schrems, who claims that techniques used by the US National Security Agency (NSA) -- as revealed by whistleblower Edward Snowden -- meant that the privacy of his user data could not be guaranteed once it had been transferred across the Atlantic.
user
employer
assistant