(27-08-2022, 07:04 PM)Mark Knowles wrote: You are not allowed to view links. Register or Login to view.Clearly there are well known examples such as the works of Giovanni Fontana.
Giovanni Fontana was also the first one that came to my mind. I suppose his cipher was more of a "finger exercise" than an attempt to seriously hide anything. This is exactly the difference with diplomatic ciphers. Here, the information should be hidden as well as possible. What is striking about the VMS is the fact that there is not a single reference to a key in plain text ( like Fontana in Cod.icon. 242 ). This would indicate, if it really is a cipher, that the entire document should be seriously protected from access by others (non-initiates?). I know of no other manuscript from this period that would be comparable in this respect.
(27-08-2022, 07:04 PM)Mark Knowles wrote: You are not allowed to view links. Register or Login to view.However I am interested in the kind of non-diplomatic ciphers that Bischoff refers to in his paper.
Do you mean this work ? Do you know a link with full access ?
Übersicht über die nichtdiplomatischen Geheimschriften des Mittelalters by Bernhard Bischoff
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Edit: It's done, I was able to login via the university.