A secure data encryption method employing a sequential-logic style mechanism for a cloud system
by Yi-Li Huang; Cheng-Ru Dai; Fang-Yie Leu; Ilsun You
International Journal of Web and Grid Services (IJWGS), Vol. 11, No. 1, 2015

Abstract: Recently, security problems have been the focuses of cloud computing research since people worry that their data/files stored in a cloud system may be illegally accessed. Also, the Advanced Encryption Standard (AES) has been widely employed to protect electronic documents. But due to the rapid development of parallel techniques and hardware speed, AES is now facing the threats of brute-force attacks. Therefore, in this study, we propose a new encryption approach, called the Secure Feedback Encryption Method (SeFEM), which utilises three security schemes, including a sequential-logic style encryption/decryption mechanism, three-dimensional operators, including XOR, binary adder and exclusive-AND and a dynamic transition box, to increase the difficulty of cracking encryption keys so as to effectively protect encrypted data from brute-force and cryptanalysis attacks. The analytical results show that the SeFEM has a higher security level, encryption efficiency and usage flexibility than the DES and AES have when encrypting cloud files.

Online publication date: Sat, 31-Jan-2015

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