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Paper Abstract and Keywords
Presentation 2005-07-29 10:00
IEEE802.15.4 ESPARSKey (Encryption Scheme Parasite Array Radiator Secret Key)
Tomoyuki Aono, Takashi Ito, Makoto Taromaru, Takashi Ohira (ATR), Hideichi Sasaoka (Doshisha Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) As the main feature of software defined radio communication systems, there is the upgrade function of softwares by over-the-air download. If the software to be downloaded is eavesdropped, it may be dangerous for a wireless terminal to be copied easily. It is, therefore, more important for downloaded softwares from base stations to wireless terminals to be encrypted than existing wireless communication systems. A secure communication scheme that uses the random fluctuation of the natural environment of communication channels is studied. We have been developing a novel secret key generation and agreement scheme that uses the fluctuation of channel characteristics with an Espar (Electronically Steerable Parasitic Array Radiator) antenna, which has been studied as a variable directional antenna for consumers. We demonstrate the prototype system in which the IEEE802.15.4/ZigBee chip is mounted.
Keyword (in Japanese) (See Japanese page) 
(in English) Espar antenna / channel characteristics / RSSI / key agreement / IEEE802.15.4 / directional antenna / ZigBee /  
Reference Info. IEICE Tech. Rep., vol. 105, no. 217, SR2005-27, pp. 45-52, July 2005.
Paper # SR2005-27 
Date of Issue 2005-07-21 (SR) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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Conference Information
Committee SR  
Conference Date 2005-07-28 - 2005-07-29 
Place (in Japanese) (See Japanese page) 
Place (in English) Yokosuka Research Park 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Technical Exhibition, Panel Discussion, Signal Processing, etc. 
Paper Information
Registration To SR 
Conference Code 2005-07-SR 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) IEEE802.15.4 ESPARSKey (Encryption Scheme Parasite Array Radiator Secret Key) 
Sub Title (in English)  
Keyword(1) Espar antenna  
Keyword(2) channel characteristics  
Keyword(3) RSSI  
Keyword(4) key agreement  
Keyword(5) IEEE802.15.4  
Keyword(6) directional antenna  
Keyword(7) ZigBee  
1st Author's Name Tomoyuki Aono  
1st Author's Affiliation ATR (ATR)
2nd Author's Name Takashi Ito  
2nd Author's Affiliation ATR (ATR)
3rd Author's Name Makoto Taromaru  
3rd Author's Affiliation ATR (ATR)
4th Author's Name Takashi Ohira  
4th Author's Affiliation ATR (ATR)
5th Author's Name Hideichi Sasaoka  
5th Author's Affiliation Doshisha University (Doshisha Univ.)
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Date Time 2005-07-29 10:00:00 
Presentation Time 20 
Registration for SR 
Paper # IEICE-SR2005-27 
Volume (vol) IEICE-105 
Number (no) no.217 
Page pp.45-52 
#Pages IEICE-8 
Date of Issue IEICE-SR-2005-07-21 

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