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- Leo_Rosen abstract "Leo Rosen was a U.S. cryptanalyst who worked with Frank Rowlett at Signals Intelligence Service (S.I.S.) before the start of World War II on Japanese ciphers. Rowlett found a method to read the messages enciphered on the Japanese PURPLE machine. Rosen deduced correctly the mechanism of the cipher machine, even though the mechanism used by PURPLE was substantially different from other machines (such as the wired rotor and pinwheel machines).Rosen built a replica of PURPLE which turned out (when a machine was found years later) to use exactly the same telephone selector switches in common use at that time in the U.S. This machine was used to decode the Japanese diplomatic messages, sometimes before the Japanese ambassadors had themselves. Rosen also contributed his engineering talents during and after the war at Arlington Hall, after the S.I.S. became the Army Security Agency, later to become AFSA and finally the present National Security Agency.".
- Leo_Rosen wikiPageID "1409555".
- Leo_Rosen wikiPageLength "1300".
- Leo_Rosen wikiPageOutDegree "18".
- Leo_Rosen wikiPageRevisionID "704554285".
- Leo_Rosen wikiPageWikiLink Ambassador.
- Leo_Rosen wikiPageWikiLink Arlington_Hall.
- Leo_Rosen wikiPageWikiLink Category:National_Security_Agency_cryptographers.
- Leo_Rosen wikiPageWikiLink Category:Possibly_living_people.
- Leo_Rosen wikiPageWikiLink Cipher.
- Leo_Rosen wikiPageWikiLink Cryptanalysis.
- Leo_Rosen wikiPageWikiLink Engineering.
- Leo_Rosen wikiPageWikiLink Frank_Rowlett.
- Leo_Rosen wikiPageWikiLink Japan.
- Leo_Rosen wikiPageWikiLink John_Tiltman.
- Leo_Rosen wikiPageWikiLink National_Security_Agency.
- Leo_Rosen wikiPageWikiLink Pinwheel_(cryptography).
- Leo_Rosen wikiPageWikiLink Purple_(cipher_machine).
- Leo_Rosen wikiPageWikiLink Rotor_machine.
- Leo_Rosen wikiPageWikiLink Telephone_selector_switches.
- Leo_Rosen wikiPageWikiLink United_States.
- Leo_Rosen wikiPageWikiLink World_War_II.
- Leo_Rosen wikiPageWikiLinkText "Leo Rosen".
- Leo_Rosen wikiPageUsesTemplate Template:US-scientist-stub.
- Leo_Rosen wikiPageUsesTemplate Template:Unreferenced.
- Leo_Rosen wikiPageUsesTemplate Template:World-War-II-bio-stub.
- Leo_Rosen subject Category:National_Security_Agency_cryptographers.
- Leo_Rosen subject Category:Possibly_living_people.
- Leo_Rosen hypernym Cryptanalyst.
- Leo_Rosen type Agent.
- Leo_Rosen type Person.
- Leo_Rosen type Scientist.
- Leo_Rosen type Person.
- Leo_Rosen type Cryptographer.
- Leo_Rosen type Scientist.
- Leo_Rosen type Agent.
- Leo_Rosen type NaturalPerson.
- Leo_Rosen type Thing.
- Leo_Rosen type Q215627.
- Leo_Rosen type Q5.
- Leo_Rosen type Q901.
- Leo_Rosen type Person.
- Leo_Rosen comment "Leo Rosen was a U.S. cryptanalyst who worked with Frank Rowlett at Signals Intelligence Service (S.I.S.) before the start of World War II on Japanese ciphers. Rowlett found a method to read the messages enciphered on the Japanese PURPLE machine.".
- Leo_Rosen label "Leo Rosen".
- Leo_Rosen sameAs Q6524190.
- Leo_Rosen sameAs m.04_6xy.
- Leo_Rosen sameAs Q6524190.
- Leo_Rosen wasDerivedFrom Leo_Rosen?oldid=704554285.
- Leo_Rosen isPrimaryTopicOf Leo_Rosen.