Cryptography – Communication system using cryptography – Fiber optic network
Reexamination Certificate
2007-07-17
2007-07-17
Jung, David Y. (Department: 2134)
Cryptography
Communication system using cryptography
Fiber optic network
C380S278000
Reexamination Certificate
active
09971077
ABSTRACT:
A method and system for distributing a key is provided which make use of effects of noise caused at the time of transmitting or receiving a signal to send a key. A transmission signal is amplified at a plurality of stages while the relationship between the transmission signal and noise is being maintained at a level enough to satisfy predetermined criteria for security measures against eavesdropping activities, and the key is sent over a long distance. The aforementioned operation makes it possible to transmit or distribute a key over a long distance while maintaining the relationship between the transmission signal and noise at a level enough to satisfy the criteria for security measures against eavesdropping activities.
REFERENCES:
patent: 5757912 (1998-05-01), Blow
patent: 5850441 (1998-12-01), Townsend et al.
patent: 6271946 (2001-08-01), Chang et al.
Shor, P. (1996)Polynomial-Time Algorithms for Prime Factorization and Discrete Logarithms on a Quantum Computer, Factoring with a Quantum Computer, arXiv:quant-ph/9508027v2, Jan. 25, 1996, pp. 1-27.
Neilsen, M. A. and Chuang, I. L.,Quantum Computations and Quantum Informatics, pp. 36-39, 226-227.
Bennett, C. H. and Brassard, G.Quantum Cryptography: Public Key Distribution and Coin Tossing, International Conference on Computers, Systems and Signal Processing. Bangalore, India Dec. 10-12, 1984. pp. 175-179.
Yuen, H. P. and Kim, A. M.Classical noise-based cryptography similar to two-state quantum cryptography, Physics Letters A 241 (1998) pp. 135-138.
Hirota Osamu
Shimizu Yasuharu
Sohma Masaki
Browdy and Neimark PLLC
Ho Thomas
Jung David Y.
Matsushita Electric - Industrial Co., Ltd.
Osamu Hirota
LandOfFree
System and method for distributing key does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method for distributing key, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for distributing key will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3763369