# William Frederick Friedman

> William Frederick Friedman was a US Army cryptographer who ran the research division of the Army's Signal Intelligence Service (SIS) in the 1930s, and parts of its follow-on services into the 1950s. In 1940, subordinates of his led by Frank Rowlett broke Japan's PURPLE cipher, thus disclosing Japanese diplomatic secrets before America's entrance into World War II.

*American cryptologist (1891–1969)*

**Canonical URL:** https://fame.am/person/william-frederick-friedman

## Identity
- **Profile type:** Academic ([Wikidata](https://www.wikidata.org/entity/Q39631))
- **Category:** Academics
- **Country:** United States
- **Born:** 1891-09-24
- **Died:** 1969-11-02
- **Status:** deceased
- **Gender:** male

## Bio

Imported from discovery source: wikidata-dump

## Fame
- **Popularity score:** 49.4 / 100
- **Momentum:** 1.5 / 100  (trend: STABLE)
- **Historical depth:** 11.6 / 100
- **Now attention:** 0.0 / 100
- **Source confidence:** 60.0 / 100
- **Profile completeness:** 70.0 / 100

## Sources
- [威廉·弗里德曼](https://zh.wikipedia.org/wiki/%E5%A8%81%E5%BB%89%C2%B7%E5%BC%97%E9%87%8C%E5%BE%B7%E6%9B%BC)
- [وليام فريدمان](https://ar.wikipedia.org/wiki/%D9%88%D9%84%D9%8A%D8%A7%D9%85_%D9%81%D8%B1%D9%8A%D8%AF%D9%85%D8%A7%D9%86)
- [Уилям Фридман](https://bg.wikipedia.org/wiki/%D0%A3%D0%B8%D0%BB%D1%8F%D0%BC_%D0%A4%D1%80%D0%B8%D0%B4%D0%BC%D0%B0%D0%BD)
- [William Friedman](https://cs.wikipedia.org/wiki/William_Friedman)
- [William Friedman](https://de.wikipedia.org/wiki/William_Friedman)
- [William F. Friedman](https://en.wikipedia.org/wiki/William_F._Friedman)
- [William F. Friedman](https://es.wikipedia.org/wiki/William_F._Friedman)
- [William F. Friedman](https://fr.wikipedia.org/wiki/William_F._Friedman)
- [William Friedman](https://it.wikipedia.org/wiki/William_Friedman)
- [윌리엄 F. 프리드먼](https://ko.wikipedia.org/wiki/%EC%9C%8C%EB%A6%AC%EC%97%84_F._%ED%94%84%EB%A6%AC%EB%93%9C%EB%A8%BC)
- [William F. Friedman](https://pt.wikipedia.org/wiki/William_F._Friedman)
- [Фридман, Уильям Фредерик](https://ru.wikipedia.org/wiki/%D0%A4%D1%80%D0%B8%D0%B4%D0%BC%D0%B0%D0%BD%2C_%D0%A3%D0%B8%D0%BB%D1%8C%D1%8F%D0%BC_%D0%A4%D1%80%D0%B5%D0%B4%D0%B5%D1%80%D0%B8%D0%BA)
- [Вільям Фредерік Фрідман](https://uk.wikipedia.org/wiki/%D0%92%D1%96%D0%BB%D1%8C%D1%8F%D0%BC_%D0%A4%D1%80%D0%B5%D0%B4%D0%B5%D1%80%D1%96%D0%BA_%D0%A4%D1%80%D1%96%D0%B4%D0%BC%D0%B0%D0%BD)
- [Wikidata](https://www.wikidata.org/wiki/Q969082)

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