fieldid E-Thesis & Research สถาบันเทคโนโลยีไทย-ญี่ปุ่น
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บทคัดย่อ
THE DESIGN AND IMPLEMENTATION OF CRYPTOGRAPHIC SYSTEM USING CHAOTIC MAPS WITH ABSOLUTE VALUE NONLINEARITY : Chaotic systems, especially Chaotic maps have been implemented in various fields of study and applications such as computer programming, electrical circuits, and computer security. Besides, Android has also been operated by a large number of users around the globe. Therefore, two cryptography approaches based on Chaotic Maps with Absolute Value Nonlinearity were proposed in this thesis. The cryptographic approaches proposed in this thesis were implemented on Android mobile platform. Dynamic behaviors of the first case and the second case from Chaotic Maps with Absolute Value Nonlinearity were described in terms of equilibria and Jacobian matrix. Moreover, dynamics of the first and the second cases of Chaotic Maps with Absolute Value Nonlinearity were simulated in terms of Bifurcation diagram, Lyapunov exponents spectrum, chaotic waveforms in time domain, and chaotic waveforms in frequency domain. The encryption process and decryption process of proposed cryptographic approaches, including the key generation, image scramble and unscramble, and XOR operation process were explained. Various images at the size of 256×256 and 512×512 pixels were used to demonstrate the encryption and decryption process of proposed cryptographic approaches. The computation time of proposed cryptographic approaches were measured. Results from the encryption process of each proposed cryptography approach were analyzed qualitatively through intensity histograms and image correlation
ผู้แต่ง
Sivapong Nilwong
ประเภทสิ่งพิมพ์
วิทยานิพนธ์ (MET) 2016
ปีที่พิมพ์
1
เลขหน้า
82 p
หัวเรื่อง
Engineering Technology--Thesis
หัวเรื่อง
Thai-Nichi Institute of Technology.Engineering Technology--Thesis
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