Cryptography – Communication system using cryptography – Symmetric key cryptography
Reexamination Certificate
2004-11-08
2009-02-24
Smithers, Matthew B (Department: 2137)
Cryptography
Communication system using cryptography
Symmetric key cryptography
C380S277000, C380S282000
Reexamination Certificate
active
07496203
ABSTRACT:
There is provided a quantum-key distribution method between a plurality of users or groups. A center prepares a predetermined number of entangled states consisting of qubits equal to the number of the users, and generates quantum states consisting of the qubits belonging to each of the entangled states and corresponding to each of the users. The center transmits each of the quantum states to each of the users after an authentication process. Each of the users receiving the quantum state makes public an axis used to measure each of the qubits constituting the quantum states. The number of users in each group measuring the qubits with a predetermined axis is represented by module4.If the sum of the module4of each group is even, each group collects the qubit measurement results of the users and acquires each group key. Therefore, it is possible to provide a high-security quantum-key distribution method between an unspecified number of users or groups.
REFERENCES:
patent: 6678379 (2004-01-01), Mayers et al.
patent: 7178277 (2007-02-01), Takeuchi
patent: 7236597 (2007-06-01), Elliott et al.
patent: 2003/0002674 (2003-01-01), Nambu et al.
patent: 2003/0106084 (2003-06-01), Liu et al.
patent: 2004/0184603 (2004-09-01), Pearson et al.
patent: P1996-7005432 (1996-10-01), None
Kumavor et al, “Comparison of Four Multi-user Quantum Key Distribution Schemes over Passive Optical Networks”, Optical Society of America, 2003, pp. 1-3.
Crepeau et al, “Secure Multi-party Quantum Computation”, ACM, May 2002, pp. 643-652.
Brassard et al, “Multi-User Quantum Key Distribution Using Wavelength Division Multiplexing”, Proceedings of SPIE, 2003, pp. 149-153.
Kumavor et al, “Comparison of Three Multi-user Quantum Key Distribution Networks”, IEEE, 2003, pp. 1042-1043.
Secure quantum cryptographic network based on quantum key distribution, arXiv: quant-ph/0403172 v1, Mar. 24, 2004, pp. 1-6.
Secure quantum cryptographic network based on quantum key distribution, pp. 1-13.
Physical Review A, vol. 54, No. 4, Oct. 1996, pp. 2651-2658.
Quantum key distribution relied on trusted information center, arXiv: quant-ph/0001045 v1, Jan. 13, 2000, 12 pages.
Chi Dong Pyo
Choi Sora
Lee Soojoon
Blakely , Sokoloff, Taylor & Zafman LLP
Electronics and Telecommunications Research Institute
Smithers Matthew B
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