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Lightweight searchable encryption method and device based on elliptic curve

A technology of elliptic curves and additive cyclic groups, which is applied to computer security devices, calculations using non-numerical representations, calculations using residual algorithms, etc., and can solve problems such as keyword guessing attacks and low keyword information entropy

Active Publication Date: 2021-03-26
SOUTHWEST PETROLEUM UNIV
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

With the deepening of research, researchers found that there is a keyword guessing attack in this method: because the information entropy of keywords is very low, that is, the number of commonly used keywords is very small, external malicious attackers can try to guess attacks

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  • Lightweight searchable encryption method and device based on elliptic curve
  • Lightweight searchable encryption method and device based on elliptic curve
  • Lightweight searchable encryption method and device based on elliptic curve

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Embodiment Construction

[0054] The content that is not described in detail in the description of the present invention belongs to the well-known technology of those skilled in the art.

[0055] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0056] refer to figure 1 , shows a flowchart of steps of an elliptic curve-based lightweight searchable encryption method provided by an embodiment of the present invention.

[0057] The lightweight searchable encryption method based on elliptic curve provided by the embodiment of the presen...

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Abstract

The invention provides a lightweight searchable encryption method and device based on an elliptic curve. The method comprises the following steps: a system initialization step; a user public and private key pair generation step; an encryption step based on keyword search; encrypting the original data file by using a universal public key encryption technology; a search trap door generating step; and a cloud server search testing step. According to the keyword guessing attack resistant lightweight searchable encryption method, an elliptic curve cryptographic algorithm is utilized, and the requirements on calculation and storage expenditure are relatively low, so that the keyword guessing attack resistant lightweight searchable encryption method has a lightweight characteristic, can be widelyapplied to various mobile intelligent terminal platforms with limited hardware resources, and has a keyword guessing resistance characteristic; therefore, the server cannot guess the keywords queriedby the user, and the information security of the cloud data is effectively guaranteed.

Description

technical field [0001] The invention relates to the technical field of cyberspace security technology, in particular to a lightweight searchable encryption method and device based on elliptic curves. Background technique [0002] With the rapid development of cloud computing technology, individual users, companies and governments choose to store encrypted data on cloud servers under the premise of ensuring security. In this case, once the user wants to search for a file matching a certain keyword, it is usually necessary to download all the ciphertext data to the local and decrypt it, and use the general search method on the decrypted plaintext to find the desired content. With the increasing amount of data, retrieving all cloud data is a challenge to network bandwidth, local storage capacity and computing power, and this traditional model does not make good use of cloud computing resources. If the decryption key and keywords are sent to the server in order to use cloud com...

Claims

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Application Information

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IPC IPC(8): G06F21/60G06F7/72
CPCG06F7/725G06F21/602
Inventor 王欣超张晓均王瑞霖王子宁郭腾飞唐尧郑爽赵芥何小曼
Owner SOUTHWEST PETROLEUM UNIV
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