Title :
Optical modulation schemes for frequency-coded quantum key distribution
Author :
Kumar, Kethavath Prem
Author_Institution :
Dept. of Electr. Eng., Indian Inst. of Technol. Kanpur, Kanpur, India
Abstract :
We discuss possible modulation schemes to implement BB84 and B92 quantum key distribution protocols using frequency-coding method. We derive time evolution of quantum states of light in a Mach-Zehnder interferometer based optical intensity modulator. We then show that phase modulator-phase modulator (PM-PM) combination can be used to implement the B92 protocol and intensity modulator-intensity modulator (IM-IM) combination can be used to implement the BB84 protocol. However, the combinations-PM-IM or IM-PM-cannot be used to implement BB84 and B92 protocols using frequency-coding method. Finally, we discuss the security of frequency-coded implementation of B92 protocol.
Keywords :
cryptographic protocols; intensity modulation; interferometers; optical modulation; phase modulation; quantum cryptography; B92 quantum key distribution protocol; BB84 quantum key distribution protocol; IM-IM combination; Mach-Zehnder interferometer; PM-PM combination; frequency coding; frequency-coded quantum key distribution; intensity modulator-intensity modulator combination; optical intensity modulator; optical modulation; phase modulator-phase modulator combination; quantum states; security; time evolution; Electrooptic modulators; Frequency; Intensity modulation; Optical beams; Optical interferometry; Optical modulation; Phase modulation; Protocols; Quantum mechanics; Security; B92; BB84; Mach-Zehnder interferometer; electro-optic effect; phase modulator; quantum key distribution;
Conference_Titel :
Communications (NCC), 2010 National Conference on
Conference_Location :
Chennai
Print_ISBN :
978-1-4244-6383-1
DOI :
10.1109/NCC.2010.5430155
