It took cryptanalysts nearly 2 centuries to crack the Great Cipher. It was a mystery that took the cryptology world by storm, as hundreds of cryptanalysts of all levels would be befuddled by the difficulty of the puzzle of years and years. It was not until the cipher was passed on to Bazeries that the secrets of the encrypted papers would finally be revealed to the curious world.
Perhaps the main reason why the Great Cipher was so secure was because the original creator of the cipher decided to expand on what was known in the world of cryptography and combine factors that would provide the current cryptanalysts with a much more difficult challenge. Keeping in mind that Bazeries took three years to crack the code, he tested many ideas that had never been seen before in the world of cryptography, let alone had been used as a cipher before. Because what was being revealed was something completely new, obviously the Great Cipher can be considered as one of the most secure if not the most secure in the entire world. Bazeries operated on a trial and error basis for months and months, where 99% of the time he would end up with no result. After countless permutations and variations, all it took was him to discover one word to become "the first person for two hundred years to witness the secrets of a Louis XIV" (Singh, 1999, pg. 57). In addition, because society was so unwilling to accept new ways to hide messages due to either complexity and/or ignorance of its effectiveness, when some brand new methodology comes along, it can be largely neglected and thought lowly of even if it is extremely effective. In the same manner, it would have had to taken someone who didn't care about social norms to try something knew and take a chance in figuring it out, hence why it took so long.