Friedman Cryptologic Collection

This collection consists of material pertaining to either the science of cryptology or William F. Friedman, one of the foremost American cryptographers. The largest portion of this collection consists of copies of NSA/CSS documents made available to the National Archives. These Signal Research Histories (SRH), which all pertain to WW II intelligence matters, include articles and lectures by Friedman, Japanese diplomatic messages, reports on various wartime intelligence agencies, and copies of GCM correspondence concerning MAGIC and ULTRA. Also included are a scrapbook kept by amateur cryptanalyst Howard T. Oakley on the various applications of codes and a series of book reviews of David Kahn’s The Codebreakers.