19-04-2023, 07:58 PM
I have a conjecture, which is probably pretty obvious, and yet which there seems to be a tendency to deny especially in the case of the Voynich manuscript.
This is namely that: “it is often much much easier to invent a cipher than to break it.”
The basis from which Gordon Rudd and the like have often said that the Voynich cannot be written in cipher is that if it were then it would have be deciphered by modern cryptographic techniques. I think this overestimates the power of modern cryptographic techniques and underestimates the easy with which a difficult cipher can be created.
To use a phrase, there is “security through obscurity”. And I don’t think one needs to be a genius with some effort to produce a pretty obscure cipher. It would not even need to be academically a clever cipher just have a combination of bizarre obscure features. You would have to give it some thought and effort to come up with a cipher, but I doubt it is that difficult. It seems to me that the Zodiac cipher and the like prove this point. There is no reason to believe the Zodiac killer was an expert cryptographer.
I raise this as I get frustrated when I hear the argument that the Voynich cannot be written in cipher, because if it was it almost certainly would have been deciphered by now. This assumes that it would not have been possible for a cipher from 600 years ago to be created which is not easy to decipher now. (I can say from my own experience that deciphering some 600 year old ciphers is not easy at all. All too often, I think people, who say it is, have never deciphered a sophistated cipher from that time.)
I think an important restriction on the complexity of a cipher tends to be practicality. One can pile cipher upon cipher upon cipher, combining lots of different cipher techniques, however it the cipher becomes too complicated then with the absense of a computer it can become impossible for a human to apply it correctly in a timely manner without making mistakes. So practicality or usability is really the force that holds back a cipher’s complexity much more than difficulty of invention does.
This is namely that: “it is often much much easier to invent a cipher than to break it.”
The basis from which Gordon Rudd and the like have often said that the Voynich cannot be written in cipher is that if it were then it would have be deciphered by modern cryptographic techniques. I think this overestimates the power of modern cryptographic techniques and underestimates the easy with which a difficult cipher can be created.
To use a phrase, there is “security through obscurity”. And I don’t think one needs to be a genius with some effort to produce a pretty obscure cipher. It would not even need to be academically a clever cipher just have a combination of bizarre obscure features. You would have to give it some thought and effort to come up with a cipher, but I doubt it is that difficult. It seems to me that the Zodiac cipher and the like prove this point. There is no reason to believe the Zodiac killer was an expert cryptographer.
I raise this as I get frustrated when I hear the argument that the Voynich cannot be written in cipher, because if it was it almost certainly would have been deciphered by now. This assumes that it would not have been possible for a cipher from 600 years ago to be created which is not easy to decipher now. (I can say from my own experience that deciphering some 600 year old ciphers is not easy at all. All too often, I think people, who say it is, have never deciphered a sophistated cipher from that time.)
I think an important restriction on the complexity of a cipher tends to be practicality. One can pile cipher upon cipher upon cipher, combining lots of different cipher techniques, however it the cipher becomes too complicated then with the absense of a computer it can become impossible for a human to apply it correctly in a timely manner without making mistakes. So practicality or usability is really the force that holds back a cipher’s complexity much more than difficulty of invention does.