Title:
HIGH-SECURITY COMMUNICATION SYSTEM, AND TRANSMITTER AND RECEIVER BOTH USED THEREIN
Document Type and Number:
WIPO Patent Application WO/2014/199474
Kind Code:
A1
Abstract:
The objective of the invention is to provide an encoding method and a communication method wherein a bit error correction is easy for an authorized recipient but difficult for an unauthorized recipient. A transmission path along which bit errors are moderately controlled is used to transmit/receive a random number sequence. A common key is shared by a transmitter and a receiver in advance; the bit values of the common key are caused to correspond to the respective slots of the random number sequence; the common key is used to divide the random number sequence into two or more random number system sequences on the basis of the correspondences; and for each of the random number system sequences, an encoding is performed and a parity check signal is generated. The unit of the encoding is equal to or greater than the length of the common key so as to make a segment analysis by an unauthorized recipient impossible.
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Inventors:
TOMARU TATSUYA (JP)
Application Number:
PCT/JP2013/066268
Publication Date:
December 18, 2014
Filing Date:
June 12, 2013
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
H04K1/02; H04L9/08
Foreign References:
| JP2002538745A | 2002-11-12 | |||
| JP2010035072A | 2010-02-12 |
Other References:
TATSUYA TOMARU: "Iso Yuragi to Shujo o Mochiita Himitsu Kagi Haiso no Kosokuka", 2010 NEN SHUNKI DAI 57 KAI EXTENDED ABSTRACTS, vol. 18A-L-14, 3 March 2010 (2010-03-03), pages 04 - 014
TATSUYA TOMARU: "DPSK Taio no Iso Yuragi Hyokaho", 2010 NEN SHUKI DAI 71 KAI EXTENDED ABSTRACTS, vol. 14P-E-12, 30 August 2010 (2010-08-30)
TATSUYA TOMARU: "DPSK Taio no Iso Yuragi Hyokaho", 2010 NEN SHUKI DAI 71 KAI EXTENDED ABSTRACTS, vol. 14P-E-12, 30 August 2010 (2010-08-30)
Attorney, Agent or Firm:
SEIRYO I. P. C. (JP)
青稜 patent business corporation (JP)
青稜 patent business corporation (JP)
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