After 9/11, the US surveillance became more intensif

fied. Shortly after the attack, the US government introduced the Patriot Act, the Accuracy Act and

the Foreign Intelligence Surveillance Act, which formed a comprehensive intelligence surv

eillance network. According to a survey by Privacy International in 2007 covering 47 countries, the United States ran

ked first in the monitoring index. But the United States didn’t stop there. In 2013, Edward Snowden, a technical an

alyst at the Central Intelligence Agency (CIA), exposed the Prism program. In this seven-year top-secret electronic sur

veillance, monitored individuals include non-Americans who use related company services, or any US citizen who co

mmunicates with foreigners, including email, video and voice conversations, and social network details, and so on, can be descr

ibed as large-scale indiscriminate monitoring. Surveillance states were finally formed.