pfeaster > 09-01-2022, 03:28 PM
(09-01-2022, 12:59 PM)Mark Knowles Wrote: You are not allowed to view links. Register or Login to view.What you have written about the Polybius square is definitely interesting.
In Meister's book we can see that by 1424 the Florentine ciphers had advanced some way....
There is a very interesting cipher key, I think, also from 1424 that Gabrielli generated from enciphered letters..... Meister isn't alive to answer why he did not include that key in his book; I suspect as it is a bit unusual and he was not sure what to make of it or who produced it.
Anton > 09-01-2022, 04:39 PM
MichelleL11 > 09-01-2022, 05:58 PM
(09-01-2022, 04:39 PM)Anton Wrote: You are not allowed to view links. Register or Login to view.The Polybius square (with a slight modification) was what I meant in You are not allowed to view links. Register or Login to view..
pfeaster > 09-01-2022, 06:57 PM
(09-01-2022, 04:39 PM)Anton Wrote: You are not allowed to view links. Register or Login to view.The concept of the Polybius square is very simple and very easily re-invented. I can imagine it being independently re-invented by the VMS creator, especially given such famous example of matrix placement of a sequence of characters as the Sator square.
R. Sale > 09-01-2022, 09:11 PM
MichelleL11 > 10-01-2022, 01:56 AM
(09-01-2022, 09:11 PM)R. Sale Wrote: You are not allowed to view links. Register or Login to view.And prior to 1549, if we're trying to get back the first half of the 1400s, doesn't that potentially lead to Byzantine sources?
ReneZ > 10-01-2022, 06:26 AM
(08-01-2022, 07:43 PM)pfeaster Wrote: You are not allowed to view links. Register or Login to view.The favored strategy for increasing security was, I take it, to increase the number of different characters in the key. The result always seems to be a much larger character set than we see in the bulk of the VM.
pfeaster > 10-01-2022, 02:02 PM
(10-01-2022, 01:56 AM)MichelleL11 Wrote: You are not allowed to view links. Register or Login to view.First, I can confirm that the chances that Leonardo Bruni saw the Chapter X fragment are probably zero.
R. Sale > 10-01-2022, 08:11 PM
Mark Knowles > 11-01-2022, 06:14 AM