Technical Communications Corporation, also known as TCC, helps its customers keep their secrets to themselves. The company makes secure communications equiment that enables users to digitally encrypt and transmit information. It also makes receivers used to decipher the data. TCC's products protect transmissions sent by radios, telephones, fax machines, computer networks, the Internet, fiber-optic cables, and satellite links. The company subcontracts much of its manufacturing and caters largely to government agencies, but it also serves financial institutions and other corporations. It derives the bulk of its sales from a very small number of customers, including the US Army.