METHOD AND DEVICE FOR GENERATING SECRET KEY IN COMMUNICATION

摘要

PURPOSE: A method and a device for generating a secret key in communication are provided to improve the security of a communication device by using the data, which are received with solving the encode of the encoded data by using the common secret value in a receiving side. CONSTITUTION: In the method and the device for generating the secret key in communication, a few stages are included. In the first stage, a device sends the own common key to the other device. In the second stage, the first middle secret value is generated by using the common key and is sent to the called device. In the third stage, the second middle secret value is generated by using the first middle secret value and the own personal key and is sent to the called device. And the secret value of the called device is generated by using the first middle secret value and the common key. In the fourth stage, the secret value of the called device is generated by using the first middle secret value and the personal key.