JPS63161745A - Terminal equipment for cryptographic communication - Google Patents

Terminal equipment for cryptographic communication

Info

Publication number
JPS63161745A
JPS63161745A JP31390686A JP31390686A JPS63161745A JP S63161745 A JPS63161745 A JP S63161745A JP 31390686 A JP31390686 A JP 31390686A JP 31390686 A JP31390686 A JP 31390686A JP S63161745 A JPS63161745 A JP S63161745A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
data
key
time
common
cryptographic key
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP31390686A
Inventor
Yasuo Kano
Original Assignee
Matsushita Electric Ind Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Abstract

PURPOSE: To prevent reduction in data transmission efficiency from being caused by outputting a data cryptographic key from a common key and a time latch value, ciphering a communication plain text and outputting a data decoding key from the common key and the time latch to decode the received cryptographic key.
CONSTITUTION: A trigger message generator 23 generating a trigger signal message when a communication session is started, a timer 17 giving data time information, a time latch 19 latching it by the trigger message, and a ciphering device 21 are provided to give the same data time information to two terminal equipments by the trigger signal message and the data cryptographic key is provided in common between two terminal equipments by using the common key KC. Thus, every time one communication session of the ciphering data communication is applied, the request of a data cryptographic key KS is not required to the key delivery center and the data transmission efficiency is not lowered.
COPYRIGHT: (C)1988,JPO&Japio
JP31390686A 1986-12-24 1986-12-24 Terminal equipment for cryptographic communication Pending JPS63161745A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP31390686A JPS63161745A (en) 1986-12-24 1986-12-24 Terminal equipment for cryptographic communication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31390686A JPS63161745A (en) 1986-12-24 1986-12-24 Terminal equipment for cryptographic communication

Publications (1)

Publication Number Publication Date
JPS63161745A true true JPS63161745A (en) 1988-07-05

Family

ID=18046941

Family Applications (1)

Application Number Title Priority Date Filing Date
JP31390686A Pending JPS63161745A (en) 1986-12-24 1986-12-24 Terminal equipment for cryptographic communication

Country Status (1)

Country Link
JP (1) JPS63161745A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03128541A (en) * 1989-08-07 1991-05-31 Matsushita Electric Ind Co Ltd System and method for cipher communication
JPH08149125A (en) * 1994-11-21 1996-06-07 Sanyo Electric Co Ltd Communication equipment and communication method
JP2656153B2 (en) * 1990-07-23 1997-09-24 エリクソン インコーポレイテッド Digital cellular communication for authentication system
JP2005309986A (en) * 2004-04-23 2005-11-04 Ntt Docomo Inc Id tag, tag reader, id tag security system and method for transmitting and restoring id tag
JP2006311622A (en) * 2006-08-09 2006-11-09 Hitachi Ltd Method, server and system for communication support
JP2008500772A (en) * 2004-05-27 2008-01-10 クゥアルコム・インコーポレイテッドQualcomm Incorporated Method and apparatus for encryption key changes during a media communication session in progress
US8081758B2 (en) 2004-12-28 2011-12-20 Hitachi, Ltd. Communication support server, communication support method, and communication support system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03128541A (en) * 1989-08-07 1991-05-31 Matsushita Electric Ind Co Ltd System and method for cipher communication
JP2656153B2 (en) * 1990-07-23 1997-09-24 エリクソン インコーポレイテッド Digital cellular communication for authentication system
JPH08149125A (en) * 1994-11-21 1996-06-07 Sanyo Electric Co Ltd Communication equipment and communication method
JP2005309986A (en) * 2004-04-23 2005-11-04 Ntt Docomo Inc Id tag, tag reader, id tag security system and method for transmitting and restoring id tag
JP4666943B2 (en) * 2004-04-23 2011-04-06 株式会社エヌ・ティ・ティ・ドコモ Id tag reader, id tag security systems and id tag transmits restoration method
JP2008500772A (en) * 2004-05-27 2008-01-10 クゥアルコム・インコーポレイテッドQualcomm Incorporated Method and apparatus for encryption key changes during a media communication session in progress
JP4699454B2 (en) * 2004-05-27 2011-06-08 クゥアルコム・インコーポレイテッドQualcomm Incorporated Method and apparatus for encryption key changes during a media communication session in progress
US8081758B2 (en) 2004-12-28 2011-12-20 Hitachi, Ltd. Communication support server, communication support method, and communication support system
JP2006311622A (en) * 2006-08-09 2006-11-09 Hitachi Ltd Method, server and system for communication support

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