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The GRANIT/160 Cipher Explained - A GDR Stasi Spy Cipher 

Cryptography for Everybody
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5 сен 2024

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Комментарии : 10   
@trimethoxy4637
@trimethoxy4637 Год назад
excellent turorial, thank you very much!
@CryptographyForEverybody
@CryptographyForEverybody Год назад
Thank you, happy you like it 🙂👍
@AarreLisakki
@AarreLisakki 2 месяца назад
Thank you for this explanation, but I have a question about the indicator group calculation. If I understand you correctly, one is to add the page concatenated with the line number (as a single 5digit number) with the secret key. But, isn't that key supposed to be reusable? And if I were to add the page/line number with the same key again for the next message, isn't this like reusing a one-time pad? I guess we don't have any kind of crib to presume as its just random page and line numbers, so maybe it can't be a problem here -- is that what's going on to make this procedure here nevertheless fine, or something else?
@michaelheynemann4267
@michaelheynemann4267 Год назад
Verstehe ich nicht. Es müsste doch zwei Indicator-Groups geben. Für jede Transposition eine, da ja zwei Seitenangaben eingebaut werden müssen. Oder wird die doppelte Gruppe der ersten bei der zweiten Transposition vorangestellt? Vielen Dank für die ausführliche Darstellung!
@CryptographyForEverybody
@CryptographyForEverybody Год назад
Hallo Michael Heynemann, Die Indikatorgruppe identifiziert die zu nutzende Seite + Zeile. Für die erste Transposition werden die ersten fünf Wörter der Zeile als Schlüssel genommen. Für die zweite Transposition werden die letzten fünf Wörter der Zeile als Schlüssel genommen. Viele Grüße, Nils Kopal
@ijfc6692
@ijfc6692 Год назад
amazing video sir, one question, can i contact you?
@CryptographyForEverybody
@CryptographyForEverybody Год назад
Hiho, That depends :-). For helping with homework, studies, etc. I don't have time -- if I help any student, I would not have time for anything else. If you have a ciphertext etc. you can contact me. You'll find my contact info on www.kopaldev.de Greetings, nils
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