Abstract: 【Purpose/significance】In the Internet era, the risk of personal information sharing is constantly increasing. In order to re⁃duce the sharing risk and improve the security of information sharing, this paper studies the personal information sharing risk and its protection countermeasures under the Internet's multi-governance model.【Method/process】First, consider multiple dimensions such as platform technology, national policies, and individuals to build a risk assessment model for personal information sharing. Then, the constructed model is verified based on actual cases, the fuzzy evaluation score of personal information sharing risk is calculated, and the comment set is compared to clarify the risk degree of personal information sharing. Finally, based on the Internet multi-governance model, corresponding solutions are proposed from three perspectives: the national level, the platform service provider level and the user level.【Result/conclusion】At the national level, information protection can be achieved by improving laws and regulations, estab⁃lishing a personal information leakage reporting system, and establishing an information review system; At the level of platform service providers, it is necessary to set the authorization of platform requests, improve the platform's implementation of user access control and personal information anonymity and encryption technology, and provide the technical basis for information protection; At the user level, it is necessary to urge users to establish awareness of personal information protection, respect the privacy of others, and con⁃sciously maintain the information security of themselves and others.【Innovation/limitation】However, among the protection counter⁃measures proposed in this study, the implementation process of various protection technologies has not been specifically analyzed.
Therefore, in the following research process, a detailed analysis of the implementation process should also be carried out. In order to provide a more complete reference for personal information security protection in the network era.