Title :
Weak-pulse implementation of SARG04 quantum cryptography protocol in free space
Author :
Jeong, Youn-Chang ; Hong, Kwan-Young ; Kim, Yong-Su ; Kim, Yoon-Ho
Author_Institution :
Dept. of Phys., Pohang Univ. of Sci. & Technol., Pohang
Abstract :
We report a weak-pulse implementation of SARG04 quantum cryptography protocol in free-space. The shifted key generation rate of 22 k bit per second and quantum bit error rate of 4% have been demonstrated. We have also studied the long-distance capability of the QKD system by adding optical losses to the quantum channel.
Keywords :
cryptographic protocols; error statistics; optical communication; optical losses; quantum cryptography; telecommunication channels; QKD system; SARG04 quantum cryptography protocol; free space quantum channel; optical losses; quantum bit error rate; shifted key generation; weak-pulse implementation; Cryptographic protocols; Cryptography; Event detection; Field programmable gate arrays; Optical attenuators; Optical losses; Optical pulses; Optical receivers; Optical transmitters; Semiconductor laser arrays; (060.5565) Quantum communications; (270.5568) Quantum cryptography;
Conference_Titel :
Lasers and Electro-Optics, 2008 and 2008 Conference on Quantum Electronics and Laser Science. CLEO/QELS 2008. Conference on
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-55752-859-9
