Safe and effective client deduplication protocol based on proofs of ownership

Abstract

The invention discloses a safe and effective client deduplication protocol based on proofs of ownership and belongs to the technical field of communications. The client deduplication protocol comprises that a system initializes a safety factor and parameter, a client and a key server communicate and obtain a key of an encrypted file by blind signature, and a cloud server and the client communicateto implement a challenge-response mechanism; the key server introduces a Rate-limiting policy to limit the number of times of the client initiating a request to the key server within a certain periodof time. The safe and effective client deduplication protocol of the present scheme resists an exhaustive attack and a spoofing attack, and ensures the security and efficiency of the proofs-of-ownership protocol. The safe and effective client deduplication protocol in the invention can improve the efficiency of authentication, save storage space, and ensure a constant communication cost.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a safe and effective client deduplication protocol based on proof of ownership. Background technique [0002] Proofs of Ownership (Proofs of Ownership) is a proof technology that the client proves to the cloud server that it owns the entire data file instead of partial data or a simple file hash value. In the proof of possession technology, the communication between the client and the cloud server adopts a challenge-response mechanism. The cloud server initiates an inquiry, the client responds, and finally the cloud server verifies whether it is established. [0003] In the era of data explosion, more and more users choose to store data in cloud servers. In order to reduce storage costs, cloud servers only store one copy of the same data. Client deduplication means that the client judges whether the data is duplicated with the cloud server data without uploadin...

AI Technical Summary

Problems solved by technology

Judging whether the data is repeated using the above method has brought great security risks to data deduplication. The attacker only needs to steal the hash value of the file to prove to the cloud server that he owns the file. At the same time, the cloud server adds the attacker to the The file owner list, and then the attacker requests the specific content of the file from the cloud server to steal the entire file