Effective and verifiable public key searching encryption method based on KP-ABE

Abstract

The invention discloses an effective and verifiable public key searching encryption method based on the KP-ABE. According to the method, a creditable authority center, a data owner, a cloud server and a data user are included. The creditable authority center generates a certificate for all cloud users; the data owner outsources a data file and a keyword to the cloud server; the cloud server executes searching operation after providing a storage service and receiving a searching request sent by a user; the data user generates a searching password and sends the password to the cloud sever to search for a target file. According to an effective and verifiable public key searching encryption method based on the KP-ABE, a public and private key pair is generated for the data owner and the cloud server, when the ciphertext keyword and the searching command are sent, the public key pair of the cloud sever is used for encrypting the ciphertext keyword and the searching command firstly, the off-line conjecture aggressive behavior of an external attacker is effectively prevented, and the safety of information and data is improved. In addition, complexity is lowered, the calculation amount of the user is largely reduced, and the efficiency is largely improved.

Description

technical field [0001] The invention belongs to the field of data encryption, in particular to an effective and verifiable public key searchable encryption method based on KP-ABE. Background technique [0002] Public-key searchable encryption is a very attractive cryptographic primitive, which implements information retrieval based on ciphertext, and is especially suitable for cloud computing environments. Public Key Searchable Encryption Scheme (PEKS) enables users to search encrypted data by keywords without revealing any information. The concept of PEKS was proposed by Boneh et al. Baek et al. proposed a PEKS that removes the security channel, making the solution more practical. Following this, Hu et al. and Zhao et al. proposed new schemes that are resistant to offline keyword guessing by external attackers. In short, the concept of PEKS is to provide a mechanism for users to search encrypted data by keywords without disclosing any information to other parties includin...

AI Technical Summary

Problems solved by technology

However, the operation of this scheme is the same as that of the cloud server when verifying the correctness, but for the user itself, this requires a large amount of calculation

In addition, the scheme ignores the offline guessing attack

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