Symmetric searchable encryption method supporting efficient sorting of results in hybrid cloud storage

Abstract

Provided is a symmetrical searchable encryption method for supporting result high-efficiency sequencing in hybrid cloud storage. A hybrid cloud storage system based on a data owning party, a data retrieving party, a private cloud platform and a public cloud platform is involved in the steps of design file preprocessing, security packing, file security storage, security inquiring and sequencing ciphertext retrieving, and the security packing and high-efficiency retrieving of a mass of file sets are organically integrated. Dual-layer security indexes are established to serve high-efficiency sequencing of ciphertext retrieving, and operations of adding, deleting, inquiring and changing dynamic indexes can be supported; the retrieving history and retrieving interests of a data user serve as subjective characteristics of ciphertext search sequencing and participate in the sequencing computation of retrieving results; the file uniqueness testing step is added to the file preprocessing step, and therefore a data repetitive deletion redundancy mechanism is achieved, the high efficiency of packing the file sets of the data owning party is ensured, and the technical support is provided for increasing the utilization rate of storage space of public cloud.

Description

technical field [0001] This application relates to the field of information security, and relates to a searchable encryption mechanism for outsourced data in a cloud computing environment. Specifically, it proposes a symmetric searchable encryption scheme that supports efficient sorting of ciphertext search results in a hybrid cloud storage system. Background technique [0002] With the improvement of cloud computing technology, cloud storage system has gradually matured due to its low cost of construction, high reliability of storage, convenience of service, high efficiency of management, and diversity of applications, and has become a user-hosted system. The preferred method for its massive data. However, the security of data storage, including data confidentiality, integrity, availability, and user privacy security, has become the primary factor restricting the wide application of cloud storage systems; in addition, the operability of cloud storage systems is also restric...

AI Technical Summary

Problems solved by technology

[0014] Aiming at the problem of efficient sorting and retrieval of symmetrical searchable encryption mechanisms in the current cloud computing security field and the effective integration of security mechanisms in cloud storage systems, the present invention combines key technologies such as inverted index, Bloom Filter index, order-preserving encryption, and convergent encryption. , a symmetric searchable encryption method that supports efficient sorting of results in a hybrid cloud storage system is proposed

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