QUANTUM CRYPTOGRAPHY WITH PHOTON PAIRS

Authors
Citation
B. Huttner et A. Peres, QUANTUM CRYPTOGRAPHY WITH PHOTON PAIRS, J. mod. opt., 41(12), 1994, pp. 2397-2403
Citations number
16
Categorie Soggetti
Optics
Journal title
ISSN journal
09500340
Volume
41
Issue
12
Year of publication
1994
Pages
2397 - 2403
Database
ISI
SICI code
0950-0340(1994)41:12<2397:QCWPP>2.0.ZU;2-E
Abstract
Photons, randomly prepared in one of two non-orthogonal quantum states , are used for a cryptographic key distribution. If the receiver tests them one by one, he may either identify their state, or get an inconc lusive (useless) result. If he tests them pairwise, he may also obtain information about their parity (whether or not they have the same sta te), without identifying each signal separately. While this procedure does not give a higher rate of information transmission, the parity-ge nerated bits are more sensitive to attacks by an eavesdropper than bit s obtained from single photons.