期刊名称：International Journal of Innovative Research in Computer and Communication Engineering
印刷版ISSN：2320-9798
电子版ISSN：2320-9801
出版年度：2019
卷号：7
期号：1
页码：319-330
DOI：10.15680/IJIRCCE.2019. 0701036
出版社：S&S Publications
摘要：More and more clients would like to store their data into cloud servers along with the rapid development
of cloud computing. The main objective of this system is to introduce duplication free cloud server with powerful
encryption and decryption data logics with the avoidance of registration centers along with multiple data owners and
data users. New security problems have to be solved in order to help more clients process their data in public cloud. All
the cloud having certain space maintenance problems, so that a new mechanism is required in proposed system, which
provides duplication free data services over cloud environment. Security is the main constraint in cloud computing
environment, which depicts the nature of the third-party registration center avoidance in remote server based data
maintenance scheme. In this system we follow the maximum security utility maximization with powerful Message
Digest Algorithm (MD5) and Intelligent Data Hashing Algorithm (DHA), which process the data with 256-bit
unbreakable encryption mechanism. More enterprises and individuals tend to outsource their personal data to the cloud
server, and utilize query services to easily access data anytime, anywhere and on any device. Searchable symmetric
encryption (SSE) is often considered as a way to guarantee data privacy and data efficiency. Various data owners
encrypt their data with different keys leading to the following two drawbacks: (a)data users need to manage multiple
keys for different data owners. (b)data users need to generate multiple trapdoors for data owners’ data even for the
same query condition. In this system, we focus on multiple data owners top-k query, whereby the cloud server can
merge multiple data indexes encrypted with different keys and efficiently support top-k query.
