KR200279035Y1 - Secure remote controller using caller ID - Google Patents

Abstract

The present invention is a remote control device that relies on a password and command code by using a wired or wireless telephone device. When a password is exposed by restricting the remote control to only a registered phone using a caller ID service. Security devices that prevent third parties from remotely controlling any telephone device

Description

Secure remote controller using caller ID service

In remote control using wired / wireless phones, mobile phones, etc., remote control such as door locks, boiler start and stop, etc., which need to prevent illegal remote control of third parties, had to rely on passwords. However, since wired and wireless transmissions can be intercepted on the way, password-based methods are very insecure, so remote control that does not require security is used by telephone. Despite being cheap and convenient, there was a problem of avoiding remote control using a telephone due to security.

When using the present door lock device, only authorized users can register the calling party number in the remote control device in advance without relying on the weak security password and securely remotely lock and open the door using wired / wireless telephones in the country or abroad. It's a configuration that you can control.

Figure 1 is a block diagram of the overall configuration.

2 is a diagram illustrating the internal functions of a microprocessor.

Brief description of the main parts

100: device for connecting a telephone signal

101: DTMF Receiver

102: microprocessor

103: output control device

104: noise canceling device induced to the telephone signal

105: FSK data demodulation device

106: Device to separate Carrier Clock from FSK data

107: FSK Data Output Device

108: ring signal detection device of the telephone

109: nonvolatile memory for storing registered caller numbers

The present invention is a dial-up device 100, ring signal detection device 108 occurs when a call is received, caller ID identification device, DTMF receiver 101 for recognizing the keypad input of the phone, microprocessor as the main computing device (102), a nonvolatile memory (109) for storing a pre-registered caller number and an output control device (103). The nonvolatile memory (109) is often present inside the microprocessor (102). In addition, the calling party number identification device includes an FSK bandpass filter 104 for removing noise induced in a telephone signal, an FSK demodulator 105 for demodulating an FSK modulated caller number into original data, and a clock separation from the FSK modulated data. It consists of an FSK carrier clock separation circuit 106 and an FSK data output device 107. The calling party number identification device consisting of (104), (105), (106), and (107) of Fig. 1 is generally embedded in one IC. The principle of operation will be described in detail with reference to FIG. 1 according to the flow of signals as follows. If a user who wants to control the phone calls a control device equipped with a wired / wireless phone or a mobile phone, a ring signal is generated. The ring detector 108 detects this and gives a signal to the microprocessor 102 indicating that a ring signal has occurred. The microprocessor 102 detects this signal and recognizes that a call is coming and prepares to recognize the calling party number that exists between the ring signal and the ring signal. If the caller number signal modulated by FSK after the ring signal appears on the telephone line, the FSK bandpass filter 104 removes unnecessary noise introduced into the telephone line and sends a signal to the FSK demodulation circuit 105 and the FSK carrier detection circuit 107. Pass it. The FSK demodulation circuit (105) demodulates the caller number signal modulated by the FSK into an original signal, makes the data readable by the microprocessor (102), and then sends the signal to the microprocessor (102). In addition, the FSK carrier detection circuit 107 detects a carrier signal from the caller ID signal modulated by the FSK, generates a clock synchronized with the data demodulated by the FSK demodulation circuit 105, and transmits the signal to the microprocessor 102. . At this time, the microprocessor 102 reads the data of the calling party number from the FSK demodulation circuit 105 in synchronization with the clock generated by the FSK carrier detection circuit 107. The microprocessor 102 compares the received calling party number data with one or more calling party number data registered in advance in the nonvolatile memory. If the caller ID does not match as a result of the comparison, the authorized user does not assume that he wants control and hangs up the telephone line. If the calling party number is matched, the authorized user assumes the control and prepares to recognize the control signal using DTMF. At this time, the user who wants to control the DTMF signal is generated by pressing the previously set control code through the keypad of 0 ~ 9, *, #, etc. through the wired / wireless phone or the mobile phone. This DTMF signal is converted into a data code that can be recognized by the microprocessor 102 such as 0 to 9, *, and # through the DTMF receiver 101, and is transmitted to the microprocessor 102. The microprocessor 102 analyzes the received control code and outputs an appropriate control output corresponding to the control code through the output control device 103. 2 illustrates a function performed inside the microprocessor 102.

In order to improve the security problem of the prior art in the remote control using a wired or wireless telephone, a security device is added so that the remote control is possible only in one or a plurality of telephones which are pre-registered using the calling party number service. Even if a password is exposed to many other uses such as door lock devices, remote control is not possible from a third party phone, so that a remote control device using a wired or wireless phone can be used inexpensively and conveniently.

Claims (3)

In remote control device using wired / wireless telephone device, one or more caller numbers are memorized and control is performed to determine the validity of the caller's number and to perform remote control only by checking the caller's number when controlling from a pre-registered telephone device. Device Built-in caller ID recognition device and storage device inside the phone device to store one or more caller numbers and check the caller number only in case of control from pre-registered phone device to judge the validity of control and remote control Control unit to perform Built-in caller ID and memory in a modem, Internet phone, or other dial-up device installed inside the computer to store one or more caller numbers, and only when controlled by a pre-registered phone device. Control device to check the legitimacy of the control by checking and perform remote control