Title:
【発明の名称】暗号化された制御信号の通信システム
Document Type and Number:
Japanese Patent JP3007225
Kind Code:
B2
Abstract:
PURPOSE:To devise the ciphered control signal not easily decoded by revising random number series data used for ciphering the control signal as required. CONSTITUTION:One random number key generating section is selected from plural random number key generating sections 2c, 2d generating prescribed random number data, and a control signal is ciphered at a control signal ciphering circuit 2f based on random number data generated by the selected random number key generating section. Moreover, random number key identification data representing the random number key generating section used for the ciphering are added to the ciphered control signal. Then the ciphered control signal with the random number key identification data added thereto is sent/received between a master station 2 and a slave station 8 to implement the communication, a control signal decoder 9 extracts the original control signal based on the random number key identification data from the ciphered control signal and decodes it. Thus, the ciphered control signal is not easily decoded.
Inventors:
Yoshiro Noguchi
Kazuo Adachi
Kazuo Adachi
Application Number:
JP14207892A
Publication Date:
February 07, 2000
Filing Date:
May 08, 1992
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H04L9/20; H04L9/06; H04L9/14; H04L9/16; (IPC1-7): H04L9/16; H04L9/20
Domestic Patent References:
| JP63203034A | ||||
| JP617744A | ||||
| JP63292833A | ||||
| JP6051341A | ||||
| JP62111538A |
Attorney, Agent or Firm:
Hiroaki Tazawa (2 outside)