Solomon Kullback
Kullback brought rigorous statistical methods to cryptanalysis and later co-developed the Kullback–Leibler divergence, an enduring tool for measuring differences between probability distributions.
Solomon Kullback was an American mathematician, cryptanalyst, and educator. He joined the U.S. Army Signal Intelligence Service in 1930 and worked in cryptanalysis and communications security through the Second World War and the early National Security Agency period.
Statistics and cryptology
Kullback’s published work connected mathematical statistics to the practical evaluation and solution of cipher systems. With Richard Leibler, he developed the divergence that bears their names, now widely used in information theory, statistics, and machine learning.
In memoriam
Kullback died in 1994. His work remains a durable bridge between cryptologic practice and mathematical research.
Timeline
- 1907Born in New York, United States.
- 1930Joins the U.S. Army Signal Intelligence Service as a junior cryptanalyst.
- 1938Publishes Statistical Methods in Cryptanalysis.
- 1952Moves into senior research and development work in the new NSA era.
- 1962Retires from NSA and expands his academic career.
- 1994Dies.
Solomon Kullback
- Type
- Person
- Era
- 1930s-1994
- Born
- 1907
- Died
- 1994
- Known for
- Statistical Methods in Cryptanalysis; Kullback–Leibler divergence; U.S. Signal Intelligence Service
- Tags
- cryptanalysis, statistics, information-theory, academic-research, signals-intelligence
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