A Novel Approach for Safeguarding Kurdish Text Files via Modified AES-OTP and Enhanced RSA Cryptosystem on Unreliable Networks
Newroz Nooralddin Abdulrazaq · Eurasian Journal of Science and Engineering · 2024
6. Concolusion There is not much research on securing Kurdish language scripts while transmitting over untrustworthy channels. Therefore, the plan is to invent techniques to transmit secure classified Kurdish scripts by employing and developing secure cryptographic techniques. This paper provides a new method for the AES-One Time Pad cipher system for message encryption/decryption and a modified RSA for secret keys (Secret AES key and OTP key) exchange between two parties. Following that, the efficiency of the proposed techniques is evaluated by testing and analyzing the entire designed system. The suggested RSA ciphers system uses two large relatively prime numbers and each one has at most two factors in place of two large prime numbers. This process gives the receiver a varied opportunity to select the public and private keys while keeping the complexity security of the original RSA i.e. the attacker should factorize the private numbers p and q to two prime numbers (as aforementioned each one has at most two factors), moreover, the attacker needs more time to cryptanalysis the classified data utilizing Brute Force attack due to increase in the probability of selecting two private numbers p and q. Furthermore, in the modified AES-OTP cipher system, the initial vector of the original AES-CBC is replaced by the One Time Pad cipher, and the key of OTP is expanded by utilizing AES key expanded processes. A comparative study shows that the modified AES-OTP is approximately identical to the original AES-CBC cipher system in time complexity, whereas, it is considered more secure than the original AES-CBC due to using a one-time pad cipher, which is considered unbreakable until now. Future work is to invent a new method to expand the OTP key for the other segments in plaintext in place of using the AES expansion key procedure.