An official website of the United States government         Here's how you know         
**Official websites use .gov**
A **.gov** website belongs to an official government organization in the United States.
**Secure .gov websites use HTTPS**
 A **lock (lock )** or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to main content (Press Enter).

National Security Agency/Central Security Service

Search
Search

Search

-  About    -  Leadership             
  -  Mission & Combat Support             
  -  Cybersecurity             
  -  Signals Intelligence             
  -  Central Security Service             
  -  Locations             
  -  Research             
  -  Diversity, Equity, Inclusion & Accessibility             
  -  Cybersecurity Collaboration Center      -  Collaborative Partnerships             
    -  Enduring Security Framework             
    -  DIB Cybersecurity Services             
    -  Standards and Certifications             
    -  Artificial Intelligence Security Center 
-  Press Room    -  Press Releases & Statements             
  -  News & Highlights             
  -  Declassification & Transparency Initiatives             
  -  Cybersecurity Advisories & Guidance             
  -  Telework and Mobile Security Guidance             
  -  DoD Microelectronics Guidance             
  -  Research Publications 
-  Careers    -  Unique Pathways             
  -  Innovation 
-  History    -  National Cryptologic Museum             
  -  Cryptologic History             
  -  National Cryptologic Memorial 

HomeHistoryCryptologic HistoryHistorical FiguresHistorical Figures View

# NSA Historical Figures

                Download            

# William F. Friedman

##                 1999 Hall of Honor Inductee            

Wolfe Frederick Friedman was born on 24 September 1891 in Kishinev, then part of imperial Russia, now Chisinau, capital of Moldova. His father, an interpreter for the Czar's postal service, emigrated to the United States the following year to escape increasing anti-Semitic regulations; the family joined him in Pittsburgh in 1893. Three years after that, when the elder Friedman became a U.S. citizen, Wolfe's name was changed to William.

After receiving a B.S. and doing some graduate work in genetics at Cornell University, William Friedman was hired by Riverbank Laboratories, what would today be termed a "think tank," outside Chicago. There he became interested in the study of codes and ciphers, thanks to his concurrent interest in Elizebeth Smith, who was doing cryptanalytic research at Riverbank. Friedman left Riverbank to become a cryptologic officer during World War I, the beginning of a distinguished career in government service.

Friedman's contributions thereafter are well known-- prolific author, teacher, and practitioner of cryptology. Perhaps his greatest achievements were introducing mathematical and scientific methods into cryptology and producing training materials used by several generations of pupils. His work affected for the better both signals intelligence and information systems security, and much of what is done today at NSA may be traced to William Friedman's pioneering efforts.

To commemorate the contributions of the Friedmans, in 2002 the OPS1 building on the NSA complex was dedicated as the William and Elizebeth Friedman Building.

**                    SHARE                

**                    PRINT                

1999William F. Friedmanhall of honorBiographyhistorical figure