Experimental study and modelling of abrasive water jet cutting of aluminum alloy 2024 | ||||
| Journal of Engineering Science and Military Technologies | ||||
| Article 2, Volume 3, Issue 1, March 2019, Page 14-22 PDF (1.12 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejmtc.2019.8057.1104 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Tawfik El Midany1; Tarek Ahmed  2; Ahmed S. El Mesalamy3; Amro M. Youssef4
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| 1Department of Manufacturing and Industrial Engineering, Mansura University | ||||
| 2Space Technology Center, Cairo | ||||
| 3Department of Mechanical Design and Manufacturing, Military Technical College | ||||
| 4Head of Mechanical Branch, Military Technical College, Cairo, Egypt. | ||||
| Abstract | ||||
| Block ciphers cryptanalysis is serious challenge specially with the existing of the powerful block ciphers that require massive number of plaintext-ciphertext pairs to perform a successful attack. Algebraic attack is superior among different attack types as it does require the smallest number of such pairs. On the other hand, the equations describe the input/output relations should be in hand to execute the algebraic attack. In this paper, we present the method of collecting the input/output algebraic equations for 2-key simplified 3-DES as a miniature example of the 2-key 3-DES. The simplified DES has similar structure and characteristics to DES with the privilege of using smaller parameters than DES. Also, we prove that the complementation property of DES can be used to double the number of obtained algebraic equations for 3-DES variants and consequently decreasing the required number of plaintext-ciphertext pairs. Finally, we compared the expected number of obtained equations and variables in both 2-key simplified 3-DES and 2-key 3-DES. | ||||
| Keywords | ||||
| Abrasive waterjet machining; machining of aluminum alloy; non-traditional cutting; statistical modeling | ||||
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