Searchable encryption method and system, storage medium, vehicle-mounted network and intelligent power grid

Abstract

The invention belongs to the technical field of wireless communication network security. The invention discloses a searchable encryption method and system, a storage medium, a vehicle-mounted networkand an intelligent power grid, and the searchable encryption method comprises the steps: carrying out vectorization of a keyword through a dual coding function, constructing an S-HashMap safety indexthrough the characteristics of a position-sensitive Hash function, and guaranteeing a single node and a single keyword on the index; measuring the similarity between the keywords by using the Euclidean distance, and generating a primary query position before query; and meanwhile, introducing a fault-tolerant value to realize fuzzy matching, and summarizing and sorting search results of each querykeyword by adopting an integral system to obtain Top-k files with the highest matching degree. According to the searchable encryption method, efficient and safe retrieval and updating of the data in the cloud environment are achieved. Aiming at data management research in a cloud environment, a searchable encryption scheme supporting multi-keyword fuzzy retrieval is designed aiming at high efficiency and safety of data retrieval and updating, so that safe and efficient data query and updating are realized.

Description

technical field [0001] The invention belongs to the technical field of wireless communication network security, and in particular relates to a searchable encryption method, system, storage medium, vehicle network, and smart grid. Background technique [0002] At present, with the rapid development of mobile computing and wireless network communication, the application of many emerging networks such as vehicle network and smart grid in storage and computing resources is restricted to a certain extent. Entities with limited resource management capabilities outsource data to cloud servers, and traditionally, data owners encrypt data and outsource it to cloud servers. Although the encryption of plaintext can ensure the confidentiality of data, it brings a large overhead for data query use, because these operations are only applicable to plaintext and not to ciphertext. If the cloud server returns the ciphertext data to the user for processing, it will obviously increase the com...

AI Technical Summary

Problems solved by technology

[0007](3) At present, the index structure of some schemes is complete and complicated, which makes it difficult to update and delete the index

[0008] The difficulties in solving the above problems and defects are as follows: (1) It is a big challenge to improve the accuracy and accuracy of multi-keyword fuzzy matching under the premise of ensuring safety. (2) The cloud server stores a large amount of encrypted data, and it becomes extremely difficult to complete the rapid update of the index without leaking the secret

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