Cryptography – Communication system using cryptography – Pseudo-random sequence scrambling
Reexamination Certificate
2006-09-22
2010-10-26
Arani, Taghi T (Department: 2438)
Cryptography
Communication system using cryptography
Pseudo-random sequence scrambling
C380S255000, C380S259000, C380S260000, C380S263000, C380S028000
Reexamination Certificate
active
07822204
ABSTRACT:
An encryption technique allowing use of classic Y-00 scheme performed using classic physical random numbers instead of quantum fluctuation in electrical communication and data storage in recording media, including a first modulation step for multilevel-modulating input data by associating with specific state pairs determined by physical random numbers, a second modulation step for outputting the output of the first step by irregularly associating with another signal by physical random numbers, and a channel coding step for channel-coding the output of the second step into desired codeword and outputting it as encrypted data, wherein the decoded signal obtained by channel-decoding the encrypted data can be discriminated which of specific state pairs the signal corresponds to and demodulated into the input data, and output by the first modulation by state pairs other than the specific state pairs and the second modulation by a physical random number different from the physical random number.
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Hirota Osamu
Onaka Hiroshi
Yoshida Setsuo
Arani Taghi T
Fujitsu Limited
Herzog Madhuri
Staas & Halsey , LLP
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