JPH04213139A - Illegal incoming preventing system - Google Patents

Abstract

PURPOSE:To effectively prevent an access from an illegal terminal to an information processor. CONSTITUTION:A pass word is collated by a pass word collating part 3 corresponding to an incoming request, the pertinent incoming is rejected by an incoming rejecting part 6 in the case of a noncoincidence, the number of times of rejecting the incoming until now is counted up by one by a number of incoming rejection judging part 7, and when the counted-up number of times gets to a prescribed threshold value, a line to which an incoming request is made is non-activated by a line non-activating part 8 after that.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an unauthorized call prevention system, and more particularly to an unauthorized call prevention system for an information processing apparatus connected to a public line and accessible from an unspecified number of terminals.

0002

[Prior Art] When an information processing device is accessed from a terminal via a public network, if there is a password mismatch, only the corresponding incoming call is rejected. In this case, a method is adopted in which only the incoming call request is rejected. The line on which the call was received is placed in a state where the call is accepted again.

[0003] In such a conventional method for preventing unauthorized incoming calls, when an attempt is made to connect by illegally accessing an information processing device from a terminal, the connection request is repeatedly made using different passwords without giving up after a single password mismatch. Sometimes the passwords match and the connection is made by chance.

[0004] Furthermore, systems in which the terminal side automatically changes the password and requests connection have the disadvantage that there is an even higher possibility that the passwords will match and the connection will be made.

[0005]

OBJECTS OF THE INVENTION An object of the present invention is to provide a system for preventing unauthorized incoming calls that can reliably reject even if an unauthorized attempt is made to connect a terminal to an information processing device.

[0006]

According to the present invention, there is provided a system for preventing unauthorized incoming calls in an information processing device connected to a public line and accessible from an unspecified number of terminals, which verifies passwords in response to an incoming call request. an incoming call rejecting means for rejecting the incoming call request when the passwords do not match as a result of the verification; a means for detecting the number of consecutive incoming call rejects on a line for which incoming calls have been rejected; and the number of times of rejection is a predetermined threshold. and line deactivation means for deactivating the line on which the call was received when the number of calls reached is reached.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the drawings.

FIG. 1 is a functional block diagram of an embodiment of the present invention. An information processing device 1 according to the present invention is connected to an unspecified number of terminals 10 (only a single terminal is shown in this example) via a public network 9. The information processing device 1 includes an incoming call reception unit 2 that receives an incoming call request from a line, a password verification unit 3 that performs password matching verification, an incoming call permission unit 4 that allows incoming calls in response to matching passwords, and an incoming call acceptance unit 4 that accepts incoming call requests from a line. An incoming call rejection number reset unit 5 that resets the number of consecutive incoming call rejections in response to permission, and an incoming call rejection unit 6 that rejects incoming calls in response to password mismatch by the password verification unit 3.
, an incoming call rejection number determination unit 7 that counts the number of consecutive incoming call rejections and determines whether the number has reached a predetermined threshold; and a line deactivation section 8.

In such a configuration, when an incoming call request is made to the information processing device 1 from the terminal 10 via the public network 9,
The incoming call reception section 2 receives this incoming call request and starts the password verification section 3.

In password verification 3, as shown in FIG.
In the password check process 21, the password input from the terminal 10 is read and compared with the password registered in the information processing device 1. In determination processing 22, the passwords are determined, and if they match, incoming call permission section activation processing 23 is performed. If there is a mismatch, the incoming call rejection unit activation process 24
I do.

[0011] The incoming call permission section 4 returns a response of incoming call permission in response to the incoming call request from the terminal 10, and establishes a connection between the terminal 10 and the information processing device 1. Then, the incoming call rejection number reset unit 5 is activated. The incoming call rejection number reset unit 5 clears the incoming call rejection number of the line where the incoming call was received to 0 in the incoming call rejection number reset process 31 as shown in FIG. shall be.

[0012] The incoming call rejection section 6 returns a response of incoming call rejection in response to the incoming call request from the terminal 10, and disconnects the line with the terminal. Then, the incoming call rejection number determination unit 7 is activated.

In the incoming call rejection number determination unit 7, as shown in FIG. 4, in an incoming call rejection number count up process 41, the number of incoming call rejections on the line where the incoming call was received is incremented by one. Then, in an incoming call rejection number comparison process 42, the number of incoming call rejections is compared with a preset threshold value, and if the number is smaller than the threshold value, the process ends, and if the threshold value has been reached, the line inactive part activation process is performed. 43, the line deactivation unit 8 is activated.

As shown in FIG. 5, the line deactivation section 8 deactivates the line on which the incoming call has been received in a line inactivation process 51, so that incoming calls on this line will no longer be accepted.

[0015]

As described above, according to the present invention, when an incoming call request is rejected due to a password mismatch, the number of consecutive rejections is counted, and when this number reaches a preset threshold, information processing is performed. Since the public line connected to the device is deactivated, it has the effect of making future connections impossible.

[0016] Therefore, when attempting to connect to an information processing device from an unauthorized terminal, even if you check the line number of the information processing device, request an incoming call to that number, and repeatedly enter different passwords, the public line will not work. Since incoming calls are no longer possible, the line number that was checked becomes invalid from now on, and unauthorized connections can be effectively prevented.

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram of an embodiment of the present invention.

FIG. 2 is a flow diagram showing the operation of a password verification unit.

FIG. 3 is a flow diagram showing the operation of an incoming call rejection reset unit.

FIG. 4 is a flow diagram illustrating the operation of an incoming call rejection number determination unit.

FIG. 5 is a flow diagram showing the operation of the line deactivation section.

[Explanation of symbols]

2 Incoming call reception department 3 Password verification section 4 Incoming call permission section 6 Call Rejection Department 7 Call rejection number judgment unit 8 Line inactive part

Claims (1)

[Claims] Claim 1. A system for preventing unauthorized incoming calls in an information processing device connected to a public telephone line and accessible from an unspecified number of terminals, comprising a password verification means for verifying a password in response to an incoming call request; an incoming call rejecting means for rejecting the incoming call request when the passwords do not match as a result of this verification; a means for detecting the number of consecutive incoming call rejections of the line for which incoming calls have been rejected; An unauthorized incoming call prevention system comprising: line deactivation means for deactivating a line where a call has occurred.