The Pers Z S was the signals intelligence agency of the German Foreign Office (German: Auswärtiges Amt) before and during World War II. It consisted of two cryptologic sections. Pers Z S was the cryptanalytic section which was called Special Service of Z Branch of the Foreign Office Personnel Department (German: Sonderdienst des Referats Z in der Personalabteilung des Auswärtigen Amtes). Its mission was the solution of foreign diplomatic codes and ciphers. The other section, which was the Cryptography Section was called Personal Z Cipher Service of the Federal Foreign Office (German: Personal Z Chiffrierdienst des Auswärtigen Amtes) (abbr. Pers Z Chi). The latter section was responsible for compilation, distribution and security of Foreign Office codes and ciphers. Both were colloquially known as Pers Z S.[1][2][3][4] Though similar in nature and operation to the OKW/Chi cipher bureau, it was a civilian operation as opposed to the military operation at OKW/Chi and focused primarily on diplomatic communications. According to TICOM interrogators it evinced an extraordinary degree of competence, primarily driven by a consistency of development not found in any other German signals bureau of the period.[5]Pers Z S/Chi was the symbol and the code name of the Chiffrierdienst, i.e. the Cryptanalysis Department of Pers Z S. Although little is known about the organization, in the final analysis, Pers Z S labored at diplomatic cryptanalysis for a regime for which there were no diplomatic solutions.[6]
^"Volume 1-Synopsis" (PDF). NSA. Retrieved 7 July 2017.
^"Volume 6 - Foreign Office Cryptanalytic Section" (PDF). NSA. p. 2. Retrieved 5 July 2016.
^Peter F Matthews (1 May 2013). SIGINT: The Secret History of Signals Intelligence in the World Wars. History Press. pp. 145–. ISBN 978-0-7524-9301-5.
^R. A. Ratcliff (14 August 2006). Delusions of Intelligence: Enigma, Ultra, and the End of Secure Ciphers. Cambridge University Press. pp. 67–. ISBN 978-0-521-85522-8.
^Peter Matthews (2 September 2013). SIGINT: The Secret History of Signals Intelligence in the World Wars. History Press. pp. 145–. ISBN 978-0-7524-9301-5.
^Cite error: The named reference talva was invoked but never defined (see the help page).
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