Study On Authentication Protocols For Internet Of Things Based On Diameter Protocol

Z-Wave is a burgeoning new protocol of the Internet of Things. It is simple andefficient, but there are some problems, such as the low efficiency of message transfer,the weak load capacity of the node, the low data transmission rate and the weak safetyperformance and other issues. The field of smart home based on the Internet of Thingsurgently needs a unified authentication protocol, which is able to solve increasinglyprominent security issues of the Internet of Things in different platforms and differentdevice access ways.The main work of this thesis is as follows:（1）The architecture of Z-Wave protocol is studied, as well as the process ofadding nodes to the network, and also key management of the protocol. The problemsof the protocol in the process mentioned above are pointed out.（2）For the lack of security in the Z-Wave protocol, a new authentication protocolof the Internet of Things is introduced, which is based on Diameter protocol. The newframework is composed of several modules including the authentication/authorizationmodule, accounting module, and secure communications module. Based on thecharacteristics of Internet of Thing devices, the algorithms referred to the modulesmentioned above are optimized. We introduce a symmetric encryption scheme based onAES and RC4, and also a key management scheme based on elliptic curve, which areable to improve the response time, the energy consumption as well as the security of thesystem.（3）The certification protocol is simulated and implemented in OMNeT++platform. In addition, system functional testing, performance testing and securityanalysis are carried out, which indicate that the ptotocol fulfills authentication andaccounting requirements. And the security of the protocol is high.