Automated Cryptanalysis of Transposition Ciphers Using Cuckoo Search Algorithm?

An approach of information security is Cryptography.Cryptanalysis is the science study to break cryptography without the encryption key. The present paper shows the benefits of the implementation of a novel genetic algorithm, the "Cuckoo Search" Algorithm (CSA) with new fitness function for the cryptanalysis of transposition cipher. The fitness function is evaluated based on the most common bigrams and trigrams. Results show that the algorithm proposed in this paper is effective for cryptanalysis of transposition cipher with long key lengths up to 30 due to its strong reliability and fast convergence speed.