Title :
A Private Key Sharing Scheme Based on Multipath Time Delay in UWB Systems
Author :
Kitaura, Akito ; Sumi, Takenori ; Tango, Toshihiro ; Iwai, Hisato ; Sasaoka, Hideichi
Author_Institution :
Grad. Sch. of Eng., Doshisha Univ., Kyotanabe
Abstract :
As a measure to prevent eavesdropping in UWB communication, this paper proposes a new method of private key sharing for UWB systems using impulse waves. Heretofore, schemes of private key sharing based on channel characteristics have been proposed for countermeasure against eavesdropper in radio communication systems using carrier modulation. However, it is generally difficult to apply the existing schemes to UWB systems where no carrier is used. In order to resolve the problem, a private key sharing scheme suitable for UWB systems was proposed. In the scheme, measurement accuracy of the arrival time difference decreases in the low SN ratio area. Therefore, in this paper, a new measurement method of the arrival time difference at both authorized radio station is proposed. Computer simulations are carried out to evaluate the performance of the proposed scheme in wireless PAN environments. The results of the computer simulations show that the proposed scheme can achieve 100% key agreement with the 3 bits error correction technique at signal-to-noise ratio of about 21 dB.
Keywords :
delays; error correction; multipath channels; personal area networks; private key cryptography; ultra wideband communication; UWB systems; arrival time difference; carrier modulation; eavesdropping; error correction technique; impulse waves; multipath time delay; private key sharing scheme; radio communication systems; signal-to-noise ratio; wireless PAN environments; Area measurement; Computer simulation; Delay effects; Error correction; Radio communication; Radio communication countermeasures; Signal to noise ratio; Time measurement; Tin; Ultra wideband communication; Information security; Multipath time delay; Private key sharing; Ultra wideband; Wireless PAN;
Conference_Titel :
Communication Technology, 2006. ICCT '06. International Conference on
Conference_Location :
Guilin
Print_ISBN :
1-4244-0800-8
Electronic_ISBN :
1-4244-0801-6
DOI :
10.1109/ICCT.2006.341996