Anonymous data sharing method and system based on data source and data main hiding

Abstract

The invention discloses an anonymous data sharing method and system based on a data source and data main hiding. In the stages of registration and request initiating, effective access control is achieved through group signature, anonymous authentication is completed to protect user identity privacy, and meanwhile the problem that the user identity is associated due to leakage of the user IP address is solved by hiding the user IP address through onion routing. In the file uploading stage, the group administrator re-encrypts the uploaded file by using a re-encryption technology and generates key information; in the file downloading stage, after revocation verification and signature verification are completed, a group administrator generates authorization information for a user, so that theuser can obtain a decryption and re-encryption key from key information, and the forward security of the scheme is ensured; and in the group dynamic stage, the group administrator performs key updating and updates encryption of the cloud file, so that the expenditure of the user side is greatly reduced.

Description

technical field [0001] The invention belongs to network security technology, and in particular relates to an anonymous data sharing method and system based on data source and data master hiding. Background technique [0002] The emergence of cloud computing technology has changed the way we share information in our daily lives. This is a ubiquitous sharing concept, because anyone can request resources from various cloud servers through many devices. In cloud services, the issue of personal identity privacy and security protection has become increasingly prominent. In the process of communication, users not only want the security of the transmitted information, but also pay more attention to the security and anonymity of their own identity information. As more identities are collected, linked and sold, it becomes easier for criminals to commit fraud. Members do not wish to reveal their identities to cloud servers, so anonymity is an important form of privacy protection. ...

AI Technical Summary

Problems solved by technology

There are currently some IP address protection schemes in other fields, such as pseudonym technology and forwarding schemes through trusted third parties. Some pseudonym technology can protect user identity privacy and IP address, but frequent changes of pseudonym will cause client overhead increase, affecting user experience; trusted third-party forwarding schemes suffer from passive and active attacks and leak real IP addresses

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