Computer Network Information System Security Prevention Methods under the Background of Big Data

With the rapid development of modern society, the administrative information content rapid growth of e-government information resource sharing becomes the key of the government departments for effective social management. The cloud technology Internet big data are widely used and popular, which enable information resources to be shared among government data and are both an opportunity and challenge for effective e-government information resource sharing. It is of great significance to enhance government credibility. Information security risk assessment is a comprehensive evaluation of the potential risk of an uncertain stochastic process, traditional evaluation methods are deterministic models, and it is difficult to measure the security risk of uncertainty. On the other hand, with the opening and complexity of information system business functions, the nonlinearity and complexity of evaluation calculation also increase. By studying the relatively mature assessment criteria and methods in the field of information security, this study analyzes the information security status of small Internet of Things system based on the characteristics of Internet of Things information security. Combining the latest research results of information entropy neural network and other fields with the original risk assessment methods, the improved AHP information security risk assessment model is verified by simulation examples.