JPH0334640A - Method and device for confidential facsimile communication - Google Patents

Method and device for confidential facsimile communication

Info

Publication number
JPH0334640A
JPH0334640A JP16693389A JP16693389A JPH0334640A JP H0334640 A JPH0334640 A JP H0334640A JP 16693389 A JP16693389 A JP 16693389A JP 16693389 A JP16693389 A JP 16693389A JP H0334640 A JPH0334640 A JP H0334640A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
transmitting
terminal
cipher key
receiving
receiving terminal
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
JP16693389A
Inventor
Yotaro Hachitsuka
Koji Nakao
Toshiaki Tanaka
Original Assignee
Kokusai Denshin Denwa Co Ltd <Kdd>
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 facilitate the confidential communication by enciphering an identifier by a first cipher key from a receiving terminal and transmitting it to a transmitting terminal, enciphering transmitting document information by a second cipher key in the transmitting terminal and transmitting it to the receiving terminal.
CONSTITUTION: A cipher part 9 is provided with an enciphering circuit 13, a decoding circuit 14, a cipher key generating/managing circuit 15, and a pseudo random digit generating/ managing circuit 16. In this state, a random digit generated by a transmitting terminal is transmitted to a receiving terminal and based on its random digit, the same first cipher key is generated by both the transmitting and the receiving terminals, and identifier information of the receiving terminal is enciphered by a first cipher key and transmitted to the transmitting terminal. In the transmitting terminal, an identifier of the receiving terminal is decoded by using a first cipher key and a format is inspected, and thereafter, by displaying it on a display part 11, a transmitting terminal user certifies the receiving terminal to be the other proper party. Also, as for document information sent by a facsimile, based on the random digit and the identification number of the receiving side, a second cipher key is generated, and encipherment/decoding are executed by using it by the transmitting side/ receiving side, respectively. In such a way, tapping is prevented.
COPYRIGHT: (C)1991,JPO&Japio
JP16693389A 1989-06-30 1989-06-30 Method and device for confidential facsimile communication Pending JPH0334640A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16693389A JPH0334640A (en) 1989-06-30 1989-06-30 Method and device for confidential facsimile communication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16693389A JPH0334640A (en) 1989-06-30 1989-06-30 Method and device for confidential facsimile communication

Publications (1)

Publication Number Publication Date
JPH0334640A true true JPH0334640A (en) 1991-02-14

Family

ID=15840350

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16693389A Pending JPH0334640A (en) 1989-06-30 1989-06-30 Method and device for confidential facsimile communication

Country Status (1)

Country Link
JP (1) JPH0334640A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06169306A (en) * 1991-10-02 1994-06-14 American Teleph & Telegr Co <Att> Protocol and device for safe communication
US6140801A (en) * 1998-07-08 2000-10-31 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Circuit and method for charging a battery based on an allowable dissipation of a housing
JP2010259085A (en) * 1995-06-30 2010-11-11 Sony Corp Information communication system, electronic apparatus and information providing device
JP2017107339A (en) * 2015-12-08 2017-06-15 京セラドキュメントソリューションズ株式会社 Image forming apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60198968A (en) * 1984-03-22 1985-10-08 Nippon Telegr & Teleph Corp <Ntt> Facsimile privacy communication system
JPS60208137A (en) * 1984-03-31 1985-10-19 Toshiba Corp Data processing system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60198968A (en) * 1984-03-22 1985-10-08 Nippon Telegr & Teleph Corp <Ntt> Facsimile privacy communication system
JPS60208137A (en) * 1984-03-31 1985-10-19 Toshiba Corp Data processing system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06169306A (en) * 1991-10-02 1994-06-14 American Teleph & Telegr Co <Att> Protocol and device for safe communication
JP2010259085A (en) * 1995-06-30 2010-11-11 Sony Corp Information communication system, electronic apparatus and information providing device
US6140801A (en) * 1998-07-08 2000-10-31 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Circuit and method for charging a battery based on an allowable dissipation of a housing
JP2017107339A (en) * 2015-12-08 2017-06-15 京セラドキュメントソリューションズ株式会社 Image forming apparatus

Similar Documents

Publication Publication Date Title
US5483595A (en) Paging device including password accessed stored cryptographic keys
US5786784A (en) Remote-control device for a video receiver
US7113601B2 (en) Method and apparatus for performing secure communications
US4159468A (en) Communications line authentication device
US5748734A (en) Circuit and method for generating cryptographic keys
US6169805B1 (en) System and method of operation for providing user&#39;s security on-demand over insecure networks
US5613005A (en) Cipher communication method and device
US5113444A (en) Random choice cipher system and method
US4160120A (en) Link encryption device
US5241597A (en) Method for recovering from encryption key variable loss
US5285496A (en) Methods and apparatus for providing a secure paging system
US4636854A (en) Transmission system
Betts Viewdata: the evolution of home and business terminals
US4484025A (en) System for enciphering and deciphering data
US6640303B1 (en) System and method for encryption using transparent keys
JPH07288514A (en) Communication equipment
CN1284818A (en) Full digital conditioned receiving method for video broadcost in cable TV network
JPH0340689A (en) Secrecy method for picture data
JPH04223787A (en) Video control system
JPH04297157A (en) Data ciphering device
JPH0730504A (en) Device for preventing use of information without permission in radio communication
JPH04211543A (en) Digital data secret device
US4805216A (en) Method and apparatus for continuously acknowledged link encrypting
JPS60208137A (en) Data processing system
US5765106A (en) Authorized cellular telephone communication access and verification control system