Even though the Snowden revelations for the first time clearly show that mass surveillance of communications is carried out on a global level, little knowledge seems to be available to the general public as well as the hacker community how these so-called COMINT operations actually work. The talk focuses on mass surveillance based on methods known from research of the interdiscplinary field of Computationanal Linguistics (or Natural Language Processing) and demonstrates how generation of selectors for mass surveilling text messages can occur.