[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

JPS6465945A - Enciphering/deciphering device - Google Patents

Enciphering/deciphering device

Info

Publication number
JPS6465945A
JPS6465945A JP62221402A JP22140287A JPS6465945A JP S6465945 A JPS6465945 A JP S6465945A JP 62221402 A JP62221402 A JP 62221402A JP 22140287 A JP22140287 A JP 22140287A JP S6465945 A JPS6465945 A JP S6465945A
Authority
JP
Japan
Prior art keywords
enciphering
key data
transmission
new
deciphering
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
JP62221402A
Other languages
Japanese (ja)
Inventor
Kazunori Sekido
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
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
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP62221402A priority Critical patent/JPS6465945A/en
Publication of JPS6465945A publication Critical patent/JPS6465945A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To insure sufficient secrecy by changing properly an enciphering/ deciphering system or key data according to a rule previously determined between information processing devices. CONSTITUTION:When it comes near to the change time of a previously determined enciphering procedure, a transmission repeat signal is transmitted to a buffer 11 from a timer 13, and the transmission of the transmission data is interrupted for a while. A KCG part 14 counts up a counter inside it at every time when change instruction is inputted, and reads out the pair of a new CDS signal and the key data from a ROM. The new CDS signal switches the switch of an enciphering/deciphering part 12, and selects a new encipher/decipher circuit. Thus, when the enciphering system and the key data are changed at definite intervals, security can be insured again through said change even if the enciphering system or the key data itself is known.
JP62221402A 1987-09-04 1987-09-04 Enciphering/deciphering device Pending JPS6465945A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62221402A JPS6465945A (en) 1987-09-04 1987-09-04 Enciphering/deciphering device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62221402A JPS6465945A (en) 1987-09-04 1987-09-04 Enciphering/deciphering device

Publications (1)

Publication Number Publication Date
JPS6465945A true JPS6465945A (en) 1989-03-13

Family

ID=16766191

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62221402A Pending JPS6465945A (en) 1987-09-04 1987-09-04 Enciphering/deciphering device

Country Status (1)

Country Link
JP (1) JPS6465945A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005236348A (en) * 2004-02-17 2005-09-02 Matsushita Electric Ind Co Ltd Wireless system, wireless apparatus, wireless communication method, and program
JP2006151582A (en) * 2004-11-29 2006-06-15 Toshiba Elevator Co Ltd Data transmission system for elevator
JP2006155263A (en) * 2004-11-30 2006-06-15 Nec Corp One-time id authentication system, authentication server, conversion server, one-time id authentication method, and program
JP2007505381A (en) * 2003-09-11 2007-03-08 ポール・ジェーソン・ロジャーズ Method and apparatus for use in security
JP2008236022A (en) * 2007-03-16 2008-10-02 Mitsubishi Electric Corp Communication equipment
JP2009534697A (en) * 2006-04-18 2009-09-24 エアバス フランス Communication method and apparatus on communication network between aircraft and ground station

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007505381A (en) * 2003-09-11 2007-03-08 ポール・ジェーソン・ロジャーズ Method and apparatus for use in security
JP2005236348A (en) * 2004-02-17 2005-09-02 Matsushita Electric Ind Co Ltd Wireless system, wireless apparatus, wireless communication method, and program
JP2006151582A (en) * 2004-11-29 2006-06-15 Toshiba Elevator Co Ltd Data transmission system for elevator
JP2006155263A (en) * 2004-11-30 2006-06-15 Nec Corp One-time id authentication system, authentication server, conversion server, one-time id authentication method, and program
JP2009534697A (en) * 2006-04-18 2009-09-24 エアバス フランス Communication method and apparatus on communication network between aircraft and ground station
JP2008236022A (en) * 2007-03-16 2008-10-02 Mitsubishi Electric Corp Communication equipment

Similar Documents

Publication Publication Date Title
EP0311112A3 (en) Remote control transmitting/receiving system
CA1328501E (en) Security system for sstv encryption
GB1062130A (en) Method and apparatus for ciphering and deciphering messages
NO913191D0 (en) INFORMATION PROCESSING DEVICE WITH REPLACEABLE SECURITY ELEMENT.
AU634857B2 (en) Block-cipher cryptographic device based upon a pseudorandom nonlinear sequence generator
FR2394131B1 (en)
EP0422230A4 (en) Data carrier and data communication apparatus using the same
GB1526652A (en) Method and apparatus for enciphering an input message
ATE160476T1 (en) ENCRYPTION METHOD
NO143601B (en) PROCEDURE FOR SETTING CODE TEXT GENERATORS IN CIFTING DEVICES
HK1016375A1 (en) Decryption of retransmitted date in an encrypted communication system
ES454978A1 (en) Circuit for disabling a radio transmitter which is continuously operated longer than a predetermined time
JPS6465945A (en) Enciphering/deciphering device
JPS5710594A (en) Remote control originating device
DE3372247D1 (en) Device for enciphering digital signals comprising one or more des circuits
NO923945L (en) SYSTEM FOR AA PREVENT A SCRAMBLER IN AA GENERATE UNUSUAL SYMBOLS
JPS5728486A (en) Video cryptographic processing system
HK83795A (en) Method and system for enciphering and deciphering data transmitted between a transmitting apparatus and a receiving apparatus
US3083263A (en) Auxiliary apparatus for teletypers
JPS6423642A (en) Confidential information sharing system
JPS57207453A (en) Managing system for key for encryption communication
JPS5763950A (en) System and device for ciphering
JPS5687959A (en) Encrypt device
GB8422325D0 (en) Enciphering and deciphering process using a public cipher key, and device implementing this process
Jeleniewski et al. Cryptographic protection of data links in computer networks.