CWSS

A dynamic encryption communication system improves the safety of encryption communication by making the cryptographic algorithm to apply, an encryption key, apparatus ID, communication timing, etc. change dynamically with time progress according to system requirements.

As compared with the system which uses the conventional single algorithm for communication, it becomes possible by using a dynamic encryption communication system to use a comparatively easy cryptographic algorithm and to realize a firmer security system.

According to the demand of a cost , data-communications rate, decryption time, and power consumption, etc., a dynamic encryption communication system chooses two or more algorithms from various cryptographic algorithms(A relatively simple algorithm and Standard cryptographic algorithms, such as the newest AES etc) , and can constitute an encryption communication system.

The application to the radio sensor network which asks for high safeties, such as an oscillating acquisition system in the places (an elevated bridge beam, a high-rise building thing, etc.) where the shock surveillance in home security, the access control to a building, and logistics and human work are difficult, is expected.

For example, in order to oppose increasing burglar and the burglar crime in recent years, the home equipped with a crime prevention security system also in a common house is increasing. Many of such security systems consist of concentrated control equipment and two or more cordless handsets equipped with the sensor, and it is connected by the wire line between concentrated control equipment and a cordless handset. Therefore, it is necessary to establish the attachment hole of wire line connection wiring in a wall, a ceiling, etc. at installation of a security system. Moreover, in order to attach a sensor cordless handset to a glass door, a front door, etc., taking the wiring length to the working volume of a door or a door too much etc. needs to be considered. As a result, the fine sight in a house is spoiled by these processings, wiring cost may also become high or the installation number of sensor cordless handsets may be restricted by the constraints. Moreover, the system glitches by cutting of wiring also arise.

In order to solve the above-mentioned subject, a radio system is introduced into the data transfer between a main phone and a cordless handset, and convenience is planned to equipment attachment etc. However, in the communication of information by radio, there is a risk of a security system being cancelled by the outflow of the information by destruction of a cordless handset, disruption of the system by the radio signal from the cordless handset and external spoofing, and interception of a radio signal, etc. Therefore, although the encryption method is adopted, if the code system by the conventional single algorithm tends to raise intensity, the scale of hardware or software will become large. And it is not suitable for small size and the radio sensor network of low power consumption. Moreover, a comparatively easy cryptographic algorithm has the high danger of being decoded by interception of a radio signal, and the duplicate of a cordless handset.

The dynamic encryption communication system which is technology new as a means which solves these subjects and improves the safety of a security system is offered.