C0033

'Entraetselung einer Geheimschrift' (manuscript)
Title
'Entraetselung einer Geheimschrift' (manuscript)
Production date
c. 1936-1937
Additional Title information
A manuscript titled: 'Entraetselung einer Geheimschrift, die mit einer allgemeinen Zirkularscheibe geschrieben wurde.' (Deciphering a cipher written with a general circular disk).
MATERIAL(s)
Paper.
Type
Book
DIMENSIONS
TBC
Serial number(s)
Contributer(S)
Austrian Cipher Bureau (?)
COLLECTION NUMBER
C0033
CONDITION
Fine. Modern binding.
Category / Subcategory (if applicable)
Location
Main collection (Durham, UK).
STATUS
In storage
provenance
Purchased from Austrian dealer Antiquariat Deinbacher (Artikel-Nr. 122304).
Acquisition Date
Jun 2021
Associated object(S)
C0030, C0031, C0032, C0034, C0035, C0036, C0037, C0038, C0039, C0040, C0041.
Record Last Updated
Aug 20, 2022
DESCRIPTION
A manuscript comprising of two parts. Part I: Begriffe (concept). Containing subsections: A. Alphabet, B. Zyklen (cycles), C. Belegung (assignment), D. Zirkularscheibe (circular disk), E. Drehung (rotation), F. Pausen (breaks) and G. Allgemeinster Fall bei Arbeiten mit der Zirkularscheibe (most general case when working with the circular disk). Part II: Entraetselung (deciphering). Containing subsections: A. Die Geheimschrift (the cipher), B. Ermittlung der Periodizität (determination of the periodicity), C. Enträtselung im besonderen (deciphering in particular), and D. Rekonstruktion der zyklischen Komplexion des Klar-Alphabetes auf der Klarscheibe (reconstruction of the cyclic complexion of the clear alphabet on the clear disk).
Notes
Acquired as part of a collection of 12 manuscripts addressing codebreaking and cryptanalysis. The manuscripts are linked to a series of training courses and lectures held in Vienna between the 17th of April - 19th of June 1936 and the 16th of October - 25th of June 1937. The manuscripts were probably produced by the Austrian Cipher Bureau.
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