Security-enhanced connection keyword search method based on public key encryption

Abstract

The invention discloses a security-enhanced connection keyword search system based on public key encryption, which mainly comprises a key management mechanism, a data owner, a data visitor and a search server, wherein the key management mechanism is responsible for generating and publishing global public parameters, generating public and private keys of the search server and generating public andprivate keys of the data visitor; and the search server is responsible for storing the encrypted ciphertext and the search ciphertext of the data owner, receiving the search key of the data visitor and then performing data search. According to the method, the characteristics of asymmetric bilinear pairs are utilized, a safe communication channel does not need to be constructed in advance, a largenumber of calculation and communication resources are saved, and keyword guessing attacks can be effectively resisted. According to the method, safety certification is performed on a proposed scheme based on deterministic DBDH hypothesis under a standard model. Finally, the correctness and the calculation consistency of the scheme are verified, and specific functionality and performance analysis is carried out.

Description

technical field [0001] The invention belongs to the technical field of data encryption search processing, and relates to a method for searching connection keywords based on public key encryption with enhanced security. Background technique [0002] Currently, we are in an information age with rapid economic and technological development, in which more and more people choose to store their private data in cloud storage centers that may not be trusted. However, since the data is out of the actual control of the user, its security will not be effectively guaranteed. In order to solve this problem, users often choose to encrypt the data and store it in the form of ciphertext, so that even if the user's data is leaked, the security of the data can still be guaranteed. As the foundation and core technology of information security, cryptography can provide confidentiality, integrity and non-repudiation of data. Therefore, cryptography has become a key technology to solve the curre...

AI Technical Summary

Problems solved by technology

[0004] However, the PEKS scheme only implements single-keyword search, which limits the wide application of the scheme

However, the currently proposed public key encryption scheme (Public Encryption with Conjunctive KeywordSearch, PECKS) that can realize connection keyword search may need to build a secure communication channel in advance, causing inconvenience and waste of resources, or failing to achieve provable security under the standard model Sex and resistance to keyword guessing attacks (Keyword Guessing Attack, KGA), low security

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