Implementation of Code-Hopping Encryption and Decryption for 2.43 GHz Digital Wireless Transceiver
| Autor: | Yi-Chiao Chen, 陳奕僑 |
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| Rok vydání: | 2011 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 99 There are two partitions mainly in this thesis, one is the wireless transmission interface and the other one is the encryption/decryption of the data packet to be communicated. The format of the wireless data packet generated by the 2.4 GHz MRF24J40MA transceiver module produced from Microchip Technology Inc. is IEEE 802.15.4-compliant. The data packet comprises the following various fields: preamble, start of frame, frame length, frame control, sequence number, addressing information, payload data, and frame check sequence (FCS). For the data encryption/decryption, the KEELOQ Code-Hopping algorithm is investigated and applied to enhance the security of the wireless communications undertaken. KEELOQ Code-Hopping algorithm has been studied, analyzed, and discussed in details. Furthermore, use two basic techniques Confusion and Diffusion to enhance security of communicated system on synchronous counters. The Microchip PIC16F887 microcontroller and its 35 PIC16 assembly language instructions are utilized to implement KEELOQ Code-Hopping to achieve improved security for the digital wireless transmission/reception over the open space. Lastly, the communication reliability and range are tested in various open sites; it can be employed in application of remote keyless entry (RKE) system effectively. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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