Genevieve Grotjan Feinstein
Grotjan Feinstein's documented breakthroughs show the central role of mathematical analysis in cryptologic operations. Her record also preserves the contribution of a woman whose wartime work was largely classified during her career.
Genevieve Grotjan Feinstein was an American mathematician and cryptanalyst hired by the Army Signal Intelligence Service in 1939. The NSA records that her September 1940 breakthrough enabled the service to build an analog machine for work against Japan's Purple diplomatic system.
Cryptologic work
She later worked on the Soviet problem that became Venona. The NSA credits her with a process for identifying reused key material, an analytical step that assisted later decryption work.
In memoriam
Feinstein left government service in 1947 and later taught mathematics. She died in 2006 and was inducted into the NSA/CSS Cryptologic Hall of Honor in 2010.
Timeline
- 1939Is hired by the Army Signal Intelligence Service.
- 1940-09Makes the breakthrough that assisted work against the Purple system.
- 1943Is assigned to the Soviet cryptanalytic problem later known as Venona.
- 1947-05Leaves government service.
- 2006-08-10Dies in Fairfax, Virginia.
- 2010Is inducted into the NSA/CSS Cryptologic Hall of Honor.
Genevieve Grotjan Feinstein
- Type
- Person
- Era
- 1930s-2006
- Born
- 1913-04-30
- Died
- 2006-08-10
- Known for
- Purple-system cryptanalysis; Venona key-reuse analysis; Signals Intelligence Service; NSA Cryptologic Hall of Honor
- Tags
- cryptanalysis, purple, venona, mathematics, signals-intelligence, women-in-cryptology
Created by Joas A Santos · Something wrong or want it removed? Open an issue.