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New Approach for Modifying DES Algorithm by Using Multiple Keys Depend on Heuristic Search Algorithm | ||
| Engineering and Technology Journal | ||
| Article 10, Volume 31, 1B, 2013, Pages 78-92 PDF (719 K) | ||
| DOI: 10.30684/etj.31.1B.10 | ||
| Authors | ||
| Alaa K. Farhan; Suhad M.Kadhem; Noor Monem; Dena Saad | ||
| Abstract | ||
| In this paper, artificial search algorithm(breath algorithm ) are used to design a symmetric key cryptography system based on DES algorithm,the LFSRs and breath algorithm are applied to generate a pseudo-random numbers sequence (PNS) which is used during the encryption process. The quality of PNSs highly depends on the set of LFSRs rule by selected the polynomial equation cells . This paper introduces a new method to enhance the performance of the Data Encryption Standard (DES) Algorithm. This is done by building a new structure for the 16 rounds in the original algorithm. This structure makes use of multiple secrete keys and the length of key is256-bits to process one block 256-bits of plain text. | ||
| Keywords | ||
| Pseudo; random sequence; LFSRs; heuristic search algorithm; Encryption algorithms; DES algorithm | ||
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