Improving Information Security in Smart City

With the introduction of the concept of smart city and the continuous advancement of its construction process, it makes people more intelligent and convenient in urban travel, shopping, medical treatment and parking. However, in the process of smart city construction, the application of big data, IoT, artificial intelligence and other information technologies, it not only makes the city more convenient, but also brings new information security risks. In order to improve the security of information in the smart city environment, this paper starts with the physical perception layer, network communication layer, computing & storage layer, data & service support layer and application layer that constitute the smart city. This paper uses literature analysis method to make a statistical analysis of the attack cases of each layer of the basic architecture of smart city, and analyzes the information security risks of each layer, such as security risks at the physical perception layer, network communication layer, application layer, and cloud service layer. In the cloud service layer, starting from the security threats faced by the cloud system, through the study of network traffic analysis technology, network intrusion detection, vulnerability assessment methods, etc.it is proposed to improve the throughput rate of the cloud system by using four-stage fluidization PF_RING processing method when analyzing and evaluating the traffic in the cloud system. The neural network analysis is used to check the security of cloud system, and the best selection algorithm is used to evaluate the security of cloud system. Experiments show that the method proposed in this paper can handle real-time network traffic capture and vulnerability detection in cloud system. Through calculation by the object of attack difficulty level to identify vulnerable object, according to the identity to enhance the level of protection, intrusion protection capacity up to 94.1% on average, to strengthen safety of cloud system, can effectively promote smart city environment protection, information security provides forceful support for the benign development of intelligent city.