pondelok 7. novembra 2016

General KGB meets world's finest cryptologic historian

From a book https://books.google.sk/books?id=35ClAgAAQBAJ&pg=PA292#v=onepage&q&f=false

And from an original article from the magazine Cryptologia:
Kahn, David(1998) 'SOVIET COMINT IN THE COLD WAR', Cryptologia, 22: 1, 1 — 24:


štvrtok 28. apríla 2016

sobota 23. apríla 2016


I've added to the Ciphers and codes of the Czech Maffie (1914-1918) a picture of the real, enciphered text, allegedly solved by Vienna's Evidenzbüro - Dechiffrierdienst and detailed photo of the cipher disk, from TV Series, Czechoslovakia in the special forces.

Are you capable emulate their achievement, and solve the secret message ?

utorok 5. apríla 2016

Ciphers and codes of the Czech Maffie (1914-1918)

Ciphers and codes of the Czech Maffie (1914-1918)
Maffie was czechoslovakian (eventually, Slovaks was involved later) resistance movement, mostly conspiratorial organisation, against Austrohungarian monarchy. It was used espionage, smuggling news from outside world, mostly from belligerent nations, such as France, Great Britain, US and to disseminate new ideas of democracy and citizen’s liberty to the society.
Was used mostly on the basis of the Alberti disk (from the book The Cryptographic front, p.63)

Cipher wheel, self made by Emanuel Voska (1875-1960), Czechoamerican, wouldbe US. spymaster and entrepreneur, good friend of the T.G. Masaryk, from the book Emanuel Voska, p. 130
Enciphered text from the postcard, intercepted by Austrian-Hungary police and cryptanalyzed by Vienna's Evidenzbureau - Deschiffrerdienst, from the book T.G. Masaryk and his opponents, p. 247

Detailed photo of the cipher disk, from an episode How we break the monarchy, ,  TV series Czechoslovakia in the special forces

(To be continued...)

CS ciphers used in WWII (1939-1945)

CS ciphers used in WWII (1939-1945)

Mr. Jozef M. Kollár’s series of articles about the Czech codes, used in WWII, from past e-zine Crypto-World. They are:

Another article about czechoslovakian cipher TTS from WWII, published in Crypto-world 1-3/2014:

 Mr. J.M. Kollar's presentation in pdf format, about czechoslovakian ciphers used in WWII:

In slovak: Predbežnú verziu prednášky J.M. Kollára o ČS šifrách v WW2 nájdete tu prezentacia01_Kollar.pdf

Professor Otokar Grosek and M. Vojvoda, P. Zajac's Powerpoint presentation about CS ciphers used in WWII, with detailed explanation of German SIGINT solution and pictures from Mr. Jiri Janecek's books.

Update, 24.9.2020:

Articles about Slovakian ciphers in WWII:
ANTAL, Eugen – GROŠEK, Otokar – ZAJAC, Pavol: Cryptology in the Slovak State During WWII
ANTAL, Eugen – GROŠEK, Otokar – ZAJAC, Pavol: Diplomatic Ciphers Used by Slovak Attaché During the WW2
ANTAL, Eugen – GROŠEK, Otokar – ZAJAC, Pavol: Overview of Ciphers used
ANTAL, Eugen – GROŠEK, Otokar – ZAJAC, Pavol: Overview of ciphers used
Eugen Antal & Otokar Grošek: O šifrách, ktoré sa používali počas