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Blockchain-based searchable encryption method

An encryption method and blockchain technology, applied in the direction of secure communication, payment system, and transmission system through chaotic signals, can solve the problems of information loss, malicious tampering, etc., and achieve strong robustness, privacy data protection, and high search efficiency Effect

Inactive Publication Date: 2018-11-06
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional searchable encryption stores user information on the server, encrypts the query content and the information content in the database before searching, which can solve the security risk in the traditional plaintext search, but there are still hidden dangers of information loss or malicious tampering

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] The user will encrypt and submit the information including personal information, transaction records, transaction purpose, transaction related parties and transaction property to the system after signing by all parties. At the same time, the user terminal generates a keyword table about the plaintext information, and the information in the table is hashed and submitted to the system together with the encrypted plaintext. The system first verifies the legitimacy of the user's identity through a series of operations using the chaotic map. If the user's identity is illegal, the writing process will be interrupted, otherwise the system will encrypt the hash table submitted by the user to form a mapping table between the hash value and its encrypted value, and write the mapping table together with the encrypted ciphertext submitted by the user to the zone blockchain.

[0022] When searching, the user enters a keyword into the system, and the keyword is hashed and submitted ...

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PUM

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Abstract

The invention discloses a blockchain-based searchable encryption method. The invention comprises the following steps: 1) after the user is signed by each party, writing the information encrypted by the proposed scheme into the blockchain; 2) when the user needs to extract the data record belonging to himself, firstly inputting the keyword that enters the blockchain for query after being encryptedat the user end; 3) searching, through the keyword, for the relevant information in the encrypted ciphertext in the blockchain by the encrypted ciphertext, and then returning the ciphertext to the user; and 4) decrypting the ciphertext returned to the user to obtain the original plaintext. The invention realizes the application of the blockchain-based searchable encryption in the blockchain, and realizes the authentication of the user identity, and ensures the legality of writing the information and the protection of the privacy data in the whole process.

Description

technical field [0001] The invention relates to the fields of block chain technology and searchable encryption technology, in particular to a searchable encryption method capable of protecting privacy. Background technique [0002] The traditional search method queries in plain text, and the user's query is also in plain text, which poses a great security risk. Unencrypted information can be easily obtained by malicious users and untrusted third parties, and user privacy is facing a great threat. In order to solve the above problems, the concept of searchable encryption is proposed. The traditional searchable encryption stores user information on the server, encrypts the query content and the information content in the database before searching, which can solve the security risk in the traditional plaintext search, but there are still hidden dangers of information loss or malicious tampering . Contents of the invention [0003] In order to make up for the deficiencies o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L9/00G06Q20/38G06Q20/40
CPCH04L63/0428G06Q20/3825G06Q20/3827G06Q20/4014H04L9/001
Inventor 陈仲寅杨柏林杜文涛潘涛林晗怡韩嵩
Owner ZHEJIANG GONGSHANG UNIVERSITY