Privacy protection system and method used for P2P social network and based on broadcast encryption

Abstract

The invention relates to a privacy protection system and method used for a P2P social network and based on broadcast encryption. The system comprises a key agreement module, a symmetrical encryption communication module and an encryption and decryption module for broadcast encryption. The key agreement module is used for conducting key agreement when instant chats are established between users in the current P2P social network and other users. The symmetrical encryption communication module is used for encrypting and decrypting broadcast encryption private keys when the users in the current P2P social network add friends and encrypting and decrypting sent instant chat information in the instant chat process. The encryption and decryption module for broadcast encryption is used for selecting the users receiving the state when the users in the current P2P social network issue the state and broadcasting the encrypted issued state, and the users receiving the state receive the information through decryption. On the basis of the P2P social network, effective access control over the social network is achieved, the information transmission amount in the social network is reduced, and the safety of user information is enhanced.

Description

technical field [0001] The invention belongs to the technical field of network security, and in particular relates to a privacy protection system and method of a P2P social network based on broadcast encryption. Background technique [0002] In today's society, social networks are more and more widely used, and most social networks such as Facebook and Renren are Client / Server models. There are many potential security threats and privacy leakage threats in this mode of social network. Online social networks (OSNs) are provider-dependent networks that do not provide mechanisms for users to fully control their own data. OSN providers can collect and select user information and data, and fully control the service, while users must rely on the services provided by this security mechanism. This does not guarantee that the trusted provider adopts privacy protection for the user. In addition, they may intentionally or unintentionally conduct data mining, targeted advertising, an...

AI Technical Summary

Problems solved by technology

However, existing P2P social networks have many disadvantages: reliance on trust, expensive anonymization and encryption technologies, etc.

But there are still many problems, such as using expensive anonymization technology for asymmetric encryption or excessive opening of user rights, etc.

At present, there is no better solution to realize a safe and efficient P2P social network

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