A privacy protection method for cross-domain dating based on mobile social network agent re-encryption

Abstract

The invention provides a mobile social network based agent proxy re-encryption cross-domain friend-making privacy protection method. Based on research on cryptography, a cross-domain re-encryption privacy protection protocol is brought forward, and privacy protection and security of mobile social network friend-making matching are realized. By use of a proxy re-encryption technology, a real access control structure of a friend-making initiator is hidden. At the same time, multiple authority centers are introduced, i.e., one authority center for one domain, the multiple authority centers are in charge of calculating secret keys, and the problems of performance bottlenecks and secret key management by use of a conventional single authority center are solved. An attribute ciphertext is associated with an access policy tree, a ciphertext access structure guarantees that only users according with a specified access control structure can obtain correct decryption secret keys and decrypt a data ciphertext of an information owner in a friend-marking center accordingly, and thus the security of a friend-making process is guaranteed.

Description

technical field [0001] The invention belongs to the field of computer science and technology, and in particular relates to a privacy protection method for making friends across domains based on mobile social network agent re-encryption. Background technique [0002] With the rapid development of mobile social networks (MSN, Mobile Social Networks) and smart terminal devices, users can share their moods, photos, activities, hobbies, etc. in MSN at any time to continuously discover new friends, thereby further expanding their social network Scope (Smart Circle, MyLifeHere, etc.). Users can find friends with common hobbies or users with certain characteristics by matching each other's personal attribute files in the cloud. However, in this process, because the cloud service provider (Cloud Services Provider, CSP) is not completely trusted, the user data stored in the cloud has security risks. For example: CSP may provide the user's data to a third party without the user's aut...

AI Technical Summary

Problems solved by technology

At the same time, in this type of model, the access control structure set by the user has the risk of being violently guessed by malicious attackers. Once successfully cracked, it will directly threaten the privacy and security of dating user data

[0005] Therefore, the friendship scheme that can only satisfy users working in the same domain is invalid

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