The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 15, 2008
Filed:
Nov. 12, 2003
Applicants:
Nicolas Gisin, Vessy, CH;
Antonio Acin, Barcelona, ES;
Valerio Scarani, Lausanne, CH;
Grégoire Ribordy, Genève, CH;
Inventors:
Nicolas Gisin, Vessy, CH;
Antonio Acin, Barcelona, ES;
Valerio Scarani, Lausanne, CH;
Grégoire Ribordy, Genève, CH;
Assignee:
Universite de Geneve, Geneva, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04K 1/00 (2006.01); H04L 9/00 (2006.01); H04K 1/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
An apparatus and method for implementing a quantum cryptography system encoding bit values on approximations of elementary quantum systems with provable and absolute security against photon number splitting attacks. The emitter encodes the bit values onto pairs of non-orthogonal states belonging to at least two sets, and such that there does not exist a single quantum operation allowing to reduce the overlap of the states in all the sets simultaneously.