In addition, the Rossignols made the cipher extra deceiving to potential codebreakers by making some of the numbers delete the previous syllable instead of signifying a unique one. Since there are so many possible syllables, this method is several times more secure, requiring a cryptanalyst to match up far more than just 26 pairs of meanings. Rather than a single letter, each number represented a full syllable in the French language. A cipher like this would be quite effective in that it would be immune to frequency analysis, but the Great Cipher was actually even more complicated. Cryptanalysts initially thought that each number corresponded to a single letter, with several ways to represent each letter. This meant that there were multiple possibilities for the significance of each number. The first characteristic of the Great Cipher that made it so strong was that it used 587 different numbers to encode messages rather than just 26 symbols, like a standard monoalphabetic substitution cipher. King Louis XIV used it to securely encrypt sensitive information regarding his political plans. It was developed by the father-and-son team of Antoine and Bonaventure Rossignol, two of the best cryptanalysts in France. The Great Cipher of King Louis XIV was an enhanced monoalphabetic substitution cipher that managed to remain unsolved for over two centuries. All these reasons makes the information as a secret for 200 years. Once, people get angry or bored about the decryption he is more likely to make more mistakes. What’s more, the amount of the work requires people to be patient. This thought provides him comfort for not trying the method at all. He may mentally tell himself that this idea is impossible since no one has used that before. Someone may have come up with the same idea with Bazeries, but the difficulty of finishing it held him back. An attempt to decrypt the method is already time-consuming and boring. For Bazeries, it takes him three years to finish decrypting the message and he is brave to try the idea of using numbers to represent the syllabus. With 587 different numbers, trying only one method without making any mistakes during the process itself is difficult to finish. The second reason is that the amount of work is huge and difficult to analyze. It is hard for someone to come up with the idea that the numbers are representing the syllabuses of words. Also, it limits people that different alphabets are related to different numbers. This limits the thoughts of people to use previous methods to solve this new encrypted method. With the development of the cryptography, more and more encrypting methods are invented. The first reason of the Great Cipher used was remained unbroken for 200 years is that the creative idea of replacing syllabus by different numbers.
0 Comments
Leave a Reply. |