JPS63310257A - Security system for modem for subscriber telephone line - Google Patents

Security system for modem for subscriber telephone line

Info

Publication number
JPS63310257A
JPS63310257A JP14667587A JP14667587A JPS63310257A JP S63310257 A JPS63310257 A JP S63310257A JP 14667587 A JP14667587 A JP 14667587A JP 14667587 A JP14667587 A JP 14667587A JP S63310257 A JPS63310257 A JP S63310257A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
modem
string
calculation
result
line
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
JP14667587A
Inventor
Hiroshi Morita
Original Assignee
Nec 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

Links

Abstract

PURPOSE: To prevent an illegal access from a MODEM having no prescribed calculating expression, by generating a radom character-string, calculating it by a prescribed calculating expression, collating a result of calculation, and checking the legality of a user.
CONSTITUTION: In the case of executing a data communication by connecting a terminal side and the center side by a subscriber telephone line, first of all, a terminal side MODEM 1 calls a center side MODEM 2 and a line is connected. After the line is connected, the MODEM 2 generates a random character-string and transmits it to the MODEM 1, and simultaneously, from this random character-string, a result is calculated by a prescribed calculating expression. The MODEM 1 which receives the random character-string executes a calculation by the same calculating expression as the prescribed calculating expression in the MODEM 2 from this random character-string, and transmits a result of calculation to the MODEM 2. The MODEM 2 collates a result of calculation by itself and a result of calculation received from the MODEM 1, and in case when they coincide, an ACK is sent back to the MODEM 1 and a data communication is started, and when they do not coincide, the line is disconnected.
COPYRIGHT: (C)1988,JPO&Japio
JP14667587A 1987-06-12 1987-06-12 Security system for modem for subscriber telephone line Pending JPS63310257A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14667587A JPS63310257A (en) 1987-06-12 1987-06-12 Security system for modem for subscriber telephone line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14667587A JPS63310257A (en) 1987-06-12 1987-06-12 Security system for modem for subscriber telephone line

Publications (1)

Publication Number Publication Date
JPS63310257A true true JPS63310257A (en) 1988-12-19

Family

ID=15413062

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14667587A Pending JPS63310257A (en) 1987-06-12 1987-06-12 Security system for modem for subscriber telephone line

Country Status (1)

Country Link
JP (1) JPS63310257A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06195024A (en) * 1991-09-13 1994-07-15 American Teleph & Telegr Co <Att> Authenticating method for opening communication channel and mobile machine
JPH07115413A (en) * 1993-10-18 1995-05-02 Nec Corp Mobile communication terminal authentication system
GB2366966A (en) * 2000-09-07 2002-03-20 Swivel Technologies Ltd Verifying the identity of a device or user in an electronic communications environment
US7043635B1 (en) 2000-09-15 2006-05-09 Swivel Secure Limited Embedded synchronous random disposable code identification method and system
US7392388B2 (en) 2000-09-07 2008-06-24 Swivel Secure Limited Systems and methods for identity verification for secure transactions

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06195024A (en) * 1991-09-13 1994-07-15 American Teleph & Telegr Co <Att> Authenticating method for opening communication channel and mobile machine
JP2675494B2 (en) * 1991-09-13 1997-11-12 エイ・ティ・アンド・ティ・コーポレーション Authentication method and mobile unit to set up a communication channel
JPH07115413A (en) * 1993-10-18 1995-05-02 Nec Corp Mobile communication terminal authentication system
GB2366966A (en) * 2000-09-07 2002-03-20 Swivel Technologies Ltd Verifying the identity of a device or user in an electronic communications environment
GB2366966B (en) * 2000-09-07 2002-08-07 Swivel Technologies Ltd Embedded synchronous random disposable code identification method and system
US7392388B2 (en) 2000-09-07 2008-06-24 Swivel Secure Limited Systems and methods for identity verification for secure transactions
US7043635B1 (en) 2000-09-15 2006-05-09 Swivel Secure Limited Embedded synchronous random disposable code identification method and system

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