To ensure widespread use, the STU-III was designed to be about the size of a conventional telephone desk set, user-friendly, and relatively low-cost. In fact, the Secure Telephone Unit, Third Generation (STU-III) was developed and produced by 1987. In 1984, the National Security Agency (NSA) initiated the Future Secure Voice System (FSVS), an aggressive, accelerated program to button up US voice communications by the end of the 1980s. In 1970, the Secure Telephone Unit, First Generation or STU-I was launched, followed in 1975 by the STU-II, which mustered some 10,000 users. In the 1960s the KY-3, one of the first practical voice encryption devices, came on the market (which was the size of a short refrigerator or fat two drawer filing cabinet).
Secure transmissions whether telephone conversations, facsimile (fax) copies, or automated information systems (AIS) communications have long been possible through encryption, but for many years the equipment was bulky, complex, and expensive. Products and services range from desktop secure phones and data modems, to fax encryptors and secure video. Government, local law enforcement agencies, banks, universities, multinational corporations and foreign governments. Granite Island Group provides a broad spectrum of information security protection protecting information transmission in a variety of mediums for the Secure Telephone Units, Crypto Key Generators, STU-III Secure Telephone Units, Crypto Key Generators, Encryption Equipment and Scramblers
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