A secure trusted Lightweight mechanism for IOB devices رسالة ماجستير

Abstract

This study highlighting the most pressing challenges and areas of research interest. A review of various lightweight encryption algorithms is conducted and a modified version of a hybrid AES algorithm combined with the Huffman compression algorithm is proposed. These algorithms and their implementation are thoroughly presented. In addition, the effectiveness of the master AES algorithm in encryption and decryption is evaluated through 100 tests with different text sizes. The obtained results indicated that the proposed algorithm exhibits improved execution time, with an average improvement of 18.75% across all test rounds. As an illustration, the performance of the algorithm is compared where an 8-byte text is encrypted and decrypted. The results show an 18.31% improvement over the master AES algorithm. 100 tests of encryption only were conducted using texts of varying sizes. The obtained results indicate that the proposed algorithm consistently outperforms the master AES algorithm in terms of speed across all test rounds. Subsequently, 100 rounds of decryption only are performed using the same texts as in the previous encryption rounds. The results show that the proposed algorithm also outperforms the master AES algorithm in terms of execution speed. The security of the algorithm was evaluated making use of two tests namely, the Avalanche Effect and the Key Sensitive Attack. The obtained results indicated which results in a 53.54% difference in ciphertext for the proposed algorithm and 51.56% for the AES algorithm. Additionally, the results of the Key Sensitive Attack test demonstrated convergence in terms of security and protection of 99% between the two algorithms, as a substantial difference in ciphertext was observed when a single letter in the key was altered.