The double transposition cipher was considered to be one of the most secure types of manual ciphers. It was extensively used in both World Wars and during the Cold War. In 1999, Otto Leiberich, the former head of the German federal office for information security, suggested that a double ...
Boryczka, U., Dworak, K.: Cryptanalysis of transposition cipher using evolutionary algorithms. In: Computational Collective Intelligence. Technologies and Applications. Springer (2014) 623–632 Google Scholar Jain, A., Chaudhari, N.S.: A new heuristic based on the cuckoo search for cryptanalysis...
🔗Caesar cipher 🔗Columnar transposition 🔗Cryptogram 🔗Double transposition 🔗Enigma machine 🔗Four-square cipher 🔗Gronsfeld cipher 🔗Keyed caesar cipher 🔗One-time pad 🔗Pigpen cipher 🔗Playfair cipher 🔗Rail fence cipher
As an application, the proposed technique is employed to solve a transposition cipher, and then the efficiency of the proposed technique is compared to the existing genetic algorithms. The obtained results indicate that the performance of the proposed technique is superior to genetic algorithms (as ...
I then identified transposition intervals with multiple bigrams and trigrams that occur frequently in English. I calculated the ratios of their English frequencies to the frequencies of bigrams and trigrams generated by a random reordering of the ciphertext. This enabled me to identify letter sequence...