Application of dynamic variable cipher security certificate in Internet of Things

With the development of Internet of Things (IOT), there are more and more concerns about the security of IOT. In terms of security of Internet, the security framework of Internet can not provide a completely solution to solve all security problems in IOT 1. This paper describes the security structure of sensor layer, network layer, and application layer in IOT. This thesis intends to analyze the security features of sensor layer, and then presents dynamic variable cipher security certificate, a new method of ID authentication among node and node in sensor layer. This certificate provides a method of “one time one cipher” between communicating parties. It's a lightweight encryption or decryption method, using time stamp technology, timeliness in the two communication partners is guaranteed. In general, dynamic variable cipher security certificate can be well applied to the communication among sensor nodes in IOT.