Citát dňa - Najväčší omyl F. M. A. Voltaira

Tí, ktorí sa chvastajú, že vedia dešifrovať list bez toho, aby boli oboznámení so záležitosťami o ktorých sa v ňom píše a bez akejkoľvek vopred získanej nápovedy sú väčší šarlatáni, než tí, ktorí o sebe s pýchou prehlasujú, že ovládajú jazyk, ktorý vôbec nikdy neštudovali.
François-Marie Arouet de Voltaire, Filozofický slovník, Heslo Poste resp. Post

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CS ciphers used in WWII (1939-1945)

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Crypto chip / The Codestar module add-on board

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The CodeStar module was designed for encryption and decryption of information for personal computers. The board was inserted into a free computer slot and occupied one 8-bit bus slot of a PC, XT, AT class computer. The module was supplied with a floppy disk with files in the Turbo C++ language under the MS-DOS OS . The original CRY 8 customer circuit, based on reliable technology had the entire information encryption and decryption algorithm hidden. This algorithm ( Feistel -type algorithm) was developed and manufactured in Switzerland for reliability on a special order basis, together with a semi-custom integrated circuit using CMOS VLSI technology. The order was placed by the Institute of Computer Systems of the Slovak Academy of Sciences (today‘s Institute of Informatics SAV ). The module was used to encrypt and decrypt the user's information or the user's entire file with an original and constantly changing key, it served to protect the user's data from unauthor...
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Military Ciphers according to cpt. Frybort

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Article about military ciphers by cpt. Bedřich Frýbort, in "Vojenský svět", 1937, 11 and 12, vol. V. I. part, pp. 438-9, II.part: pp. 479-80, Title of the article in czech: "Šifrování": etc... Content of the article is probably about basic cipher systems used in military exercises in Czechoslovakia. Member of the group C of cipher solutionists at Czechoslovak HQ of the Ministry of Defence headed by lieutenant colonel  Josef RŮŽEK , in czech:"člen šifrové skupiny C HV MNO", according to Porubský, Š.: Application and Misapplication  of the Czechoslovak STP cipher during WWII (report on an unpublished manuscript) . In: Tatra Mountains Mathematical Publications , vol. 70, no. 3, p.47
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