JPS63202170A - Remote control method using password code - Google Patents

Abstract

PURPOSE:To minimize an intercepted password code to be tentative damage by forming a part of the password to be a variable value being a present parameter fluctuated with the elapse of time to decrease the number of digits of the pass work to be stored by the user. CONSTITUTION:The password code consists of fixed digits D1, D4 and variable digits D2, D3, the fixed digits D1, D4 are set by the user, and any present value of a month parameter P1, a day parameter P2 and an hour parameter P3 predetermined by the system is set as the variable digits D2, D3. When the user applies the service request from a transmission section 1 at 1:15 pm, the user inputs '9130' as the password code. The password code is sent through a telephone line 2 and received by a reception section 3 of the controller 4. The reception section collates the fixed digits in a way similar to a conventional method and the variable digits of the password code depending on the present time of a timer 6.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a remote control method in a remote control system using a telephone line.

[Conventional technology]

Conventionally, in remote control systems using telephone lines as shown in Figure 3, a fixed value n-phase method (n = 1.2
．． 3-...-) were used. That is, in the country, when a user requests a service from a remotely located control device 14, a service request signal is sent from the transmitter 11 to the receiver 13 via the telephone line 12. When the receiving section 13 receives this, it sends a PIN code request signal to the transmitting section xi.

The user manually enters the password after confirming the password code request from the transmitter 11. As a result, the transmitter 11 outputs the password manually entered by the user to the receiver 13.

The receiving unit 13 checks the PIN code registered in advance by the user, and if it matches, the control device! A control line is set between the transmitter 4 and the transmitter 11. If there is a mismatch, the receiver 1
3 requests the transmitter 11 for the PIN code again and performs the retry process, but the mismatch occurs m times (m=1.2.3・=-
) At the time when this occurs, disconnection processing is executed for the transmitter 1.

FIG. 4 shows an example of the password code when n=4. This pin code is Di, D2. It consists of digits D3 and D4, and in this case r5678J is set.

[Problem that the invention seeks to solve]

In the above-mentioned remote control system using a conventional password, familiar numbers are often used as the password so that the user does not forget the registered numbers. However, the drawback is that it is difficult for users to memorize it without confusing it with other pin codes, and to maintain confidentiality from third parties. If the number of digits n increases, the number of retries m must be increased in consideration of operational errors when the user enters the password manually, which also has the disadvantage of weakening protection against malicious attempts.

[Means for solving problems]

In the remote control method using a PIN code of the present invention, a user inputs a PIN code consisting of fixed value digits and variable value digits, the number and position of which are predetermined, to each of the fixed value digits and variable value digits. A number is set and transmitted to a control device via a telephone line, and upon receiving the PIN code, the receiver of the control device checks the PIN code and determines that the fixed value is a predetermined value;
In addition, a control line is set between the control device and the transmitter only when the variable value is the current value of a predetermined parameter that changes over time.

[Effect]

Therefore, the number of digits to memorize out of the number of digits of the PIN code is reduced by the number of digits of the variable value, and by reducing the number of digits to memorize, the number of errors in entering the PIN code is also reduced. Since it contains a variable code that changes depending on the password, it is difficult for the PIN code to be stolen, and even if it is stolen, the damage will only be temporary.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic diagram of an embodiment of a remote control system to which the remote control method using a PIN code of the present invention is applied, and FIG. 2 is a diagram showing the format of the PIN code in this embodiment.

In this embodiment, the PIN code is a fixed value digit DI.

D4 and variable value digit D2. Consists of D3 digits, fixed value digit DI
, D4 are set by the user with codes predetermined by this system, and variable value digits D2 . D3 contains the current value of any of the month parameter P1, day parameter P2, and hour parameter P3 predetermined in this system (01-12 for month parameter P1, old to 31 for day parameter, and hour parameter 00 to 23) are set. In order to check the manual input of the variable value into the variable value digit, a timer 5.6 is provided in each of the transmitter 1 and the receiver 3.

Next, the operation of this embodiment will be explained. Here, it is assumed that r90J is set as the fixed value of the password and hour parameter P3 is set as the variable value in the system.

When a user attempts to request a service from the transmitter 1, the current time on the timer 5 is checked. Now this time is 1pm
If the time is 15 minutes, the user will use r913 as the PIN code.
0J is done manually. This password code is transmitted through the telephone line 2 and received by the receiving section 3 of the control device 4. Receiving section 3
As for the fixed value digit, the transmitted personal identification code is verified by the current time of the timer 6 for the variable value digit, as in the conventional case. In this case, since the transmitted personal identification code is the correct code r9130, the receiving section 3 sets up a control line between the control device 4 and the transmitting section l. This results in
It becomes possible to control the control device 4 from the transmitter l.

Note that instead of using the timer 5 of the transmitter 1, the variable value digits may be set using the user's clock.

[Effects of the Invention] As explained above, the present invention reduces the number of digits of the PIN code that the user memorizes by making part of the PIN code a variable value that is the current value of a parameter that changes over time. This has the effect of making it easier for users to use, making it difficult for the PIN code to be stolen, and even if the PIN code is stolen, the damage will only be temporary because the PIN code changes over time.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of an embodiment of a remote control system to which the remote control method using a PIN code of the present invention is applied, and FIG. 2 is a diagram showing the format of the PIN code used in the system of FIG. FIG. 3 is a schematic diagram of a conventional remote control system using a PIN code, and FIG. 4 is a diagram showing the format of a conventional n-digit fixed value type PIN code. 1...... Transmitting section, 2... Telephone line, 3... Receiving section, 4...
-Control device, 5.6-...Timer. Figure 1 [Ding Yi 11! [tsuharu [1ffiJ ■ Shiro ■ [↓ Jf! 2 Figure 1 fl set I Figure 4

Claims (1)

[Claims] In a remote control system using a telephone line, a user inputs a personal identification code consisting of fixed value digits and variable value digits in which the number and position of digits are predetermined. A number is set for each of the numbers and transmitted to the control device via a telephone line, and upon receiving the code, the receiver of the control device checks the code and determines that the fixed value is a predetermined value;
and a remote control method using a password, in which a control line is set between the control device and the transmitter only when the variable value is the current value of a predetermined parameter that changes over time.