Frank B. Rowlett
Rowlett worked on both breaking foreign systems and protecting U.S. communications. That dual role is an early example of the defensive and analytical disciplines that modern security teams must combine.
Frank B. Rowlett joined the U.S. Army Signal Intelligence Service in 1930 as one of William F. Friedman’s first junior cryptanalysts. He worked with colleagues on Japanese diplomatic machine systems, including RED and PURPLE.
Offense and defense in cryptology
Alongside cryptanalysis, Rowlett helped develop SIGABA with the U.S. Navy. NSA historical material describes SIGABA as never solved by the Axis during the Second World War, making his career an important bridge between evaluating adversary systems and building secure national systems.
In memoriam
Rowlett died in 1998. NSA’s Rowlett Award preserves his name in recognition of cybersecurity work.
Timeline
- 1908Born in Rose Hill, Virginia, United States.
- 1930Joins the Signal Intelligence Service.
- Mid-1930sHelps solve the Japanese diplomatic RED system.
- 1939–1940Plays a major role in the solution of PURPLE.
- 1966Retires from U.S. federal service.
- 1998Dies at age 90.
Frank B. Rowlett
- Type
- Person
- Era
- 1930s-1998
- Born
- 1908
- Died
- 1998
- Known for
- Japanese RED and PURPLE systems; SIGABA; Signal Intelligence Service
- Tags
- cryptanalysis, sigaba, purple, signals-intelligence, communications-security
Created by Joas A Santos · Something wrong or want it removed? Open an issue.