Electronic device control apparatus

Abstract

The electronics controller and electronic devices can securely share a common key and make an encrypted communication. A serial key of the electronic device controlled by the element to obtain a serial key 102 is obtained. A common key of the electronic device stored at the element to store a common key 103 is encrypted at the element to encrypt a common key 104 by a serial key, and is transmitted to the electronic device by the element to transmit an encrypted common key 106. A common key is shared by the electronics controller and electronic device. A control signal is encrypted by a shared common key, and is transmitted to the electronic device.

Description

technical field [0001] The present invention relates to an electronic equipment control device for controlling electronic equipment through communication, and electronic equipment controlled by the electronic equipment control device, and particularly to a device for encrypting communication between the electronic equipment control device and electronic equipment with a common key . Background technique [0002] In the past, in electronic equipment, especially home appliances, such as remote control devices for TVs and air conditioners, there was a device for controlling electronic equipment by means of communication. External remote control to control all home appliances in the home. [0003] The electronic device control device according to the present invention is not a device for controlling specific electronic devices, but a device capable of controlling electronic devices such as various home appliances constituting a home, for example. In this way, assuming that a v...

AI Technical Summary

Problems solved by technology

[0004] Therefore, it is considered to encrypt the communication between the electronic equipment control device and the electronic equipment, but especially for home appliances, since it cannot be provided with a high computing power, it is impossible to use public key cryptography that requires high computing power. Encryption method, but have to use the common key encryption method that makes the electronic equipment control device and electronic equipment have a common key to perform encryption

However, with regard to the common key encryption method, the electronic equipment must be notified of the common key before secure communication between the electronic equipment control device and the electronic equipment is established. Malicious person provides an opportunity to learn the shared key

In particular, this problem will become more prominent in the case of a wireless method using radio waves to carry out communication between the electronic device control device and the electronic device, and in the case of using a wired method such as indoor wires.

[0005] In addition, regarding the common key encryption method, an attack method called a copy attack is known. A malicious person stores the obtained communication content in advance by monitoring the communication, and then transmits the stored communication content as it is. which can cause malfunction of electronic equipment

[0006] In addition, it is more convenient for the control device that controls the home appliances to be located in each room, for example, although there are a plurality of electronic device control devices in one family, and it is necessary to make them coordinate to control the home appliances. Relatively high, but there is no such coordinated electronic equipment control device

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