Cloud data security protection method adopting fully homomorphic encryption technology and multiple digital watermarking technology

Abstract

The present invention discloses a cloud data security protection method adopting a fully homomorphic encryption technology and a multiple digital watermarking technology. The cloud data security protection method is characterized in that in a cloud computing environment, a trusted third-party organization distributes a key to a user, after the user stores the key, a fully homomorphic encryption scheme is adopted to encrypt to-be-uploaded data at a user side, then the encrypted data is uploaded to a cloud side, thereby ensuring transmission security and storage security of data; in addition, when the user searches for data, direct search for ciphertext can be performed after a search keyword is encrypted, thereby improving search efficiency; and moreover, before the data is uploaded to the cloud side, a fragile watermarking and a robust watermarking are respectively embedded into the to-be-uploaded data, the purpose of embedding of the fragile watermarking is to prevent illegal modification of the data, so as to achieve authentication for integrity of the data, and the purpose of embedding of the robust watermarking is to protect copyright of the data, so as to achieve authentication for copyright of the data.

Description

technical field [0001] The invention belongs to the field of cloud computing security, and in particular relates to a cloud data security protection method of fully homomorphic encryption and multiple digital watermarking technologies. Background technique [0002] Since Google proposed the concept of mobile cloud computing in 2006, various services and platforms related to cloud computing have appeared in people's field of vision, and cloud services have become more and more popular due to their convenience, scalability, and savings. , users can store and calculate information in the cloud, which reduces many constraints caused by limited storage and computing resources. [0003] Although many research institutions believe that cloud computing provides a reliable and secure data storage center, the security problem is still not to be ignored in cloud computing. Due to the inherent characteristics of cloud computing, under the cloud computing model, the important data of en...

AI Technical Summary

Problems solved by technology

[0007] Multiple digital watermarking technology: Multiple digital watermarking refers to embedding multiple digital watermarks in the same digital work. With the deepening of digital watermarking technology in digital product applications, single watermarking can no longer meet people's needs in some aspects. For example, robust watermarking can effectively authenticate copyrights, but cannot prove tampering of works

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