Research Of Bluetooth SPP Application Layer Encryption Based On Chaos Algorithm

In recent years,with the maturity of Internet technology,people are already accustomed with the way of life and work under data interconnection.The Internet of things(IoT)is becoming more and more popular,at the same time,the devices in the industry is also pursuing intelligence and convenience.The major method of data transmission in the industrial field is wired serial mode,this transmission mode will constraint the equipment connection pattern,so,how to use a safe wireless communication mode to replace the traditional wired communication mode has become the research focus of industrial intelligent.In the background of using Bluetooth technology in the industrial,this paper researched the data security in Bluetooth SPP protocol to resolve the problem while replace the traditional serial transmission mode,and puts forward a method of Bluetooth SPP protocol application layer encryption by chaotic key sequences in order to improve the security features of SPP protocol,so can solve the security problems that use SPP protocol in the industrial field.The main work in this paper is shown as follows:Firstly,this paper described the Bluetooth technology briefly,and analyzed the characters of Bluetooth technology and Bluetooth protocol stack structure,and researched each layer of Bluetooth protocol stack,according to the characteristics of SPP protocol,we discussed the problems of apply SPP protocol in the industrial field,combined with industry data security requirements,this paper presents the security problems to use Bluetooth SPP protocol in the industrial field.Secondly,this paper researched the security mechanism of Bluetooth technology,according to the Bluetooth protocol stack,analyzed the safety characteristic of baseband layer,link layer and application layer,based on the characteristics of chaotic system,carried out the solution that encrypts the data in SPP application layer by chaos key.And based on this solution,the method and process of chaotic key generation,data encryption and data decryption are completed.Finally,the simulation and verification of the SPP application layer encryption method based on chaos sequence proposed in this paper is carried out.The simulation and verification result show that the method of Bluetooth SPP protocol application layer encryption by chaotic key sequences can encrypt and decrypt data successfully in SPP application layer.Compared with the traditional fixed key stream encryption method,the method proposed in this paper can improve the data security performance to some extent.This method can provide further value for improving the intellectualization and portability in the industrial field.