A Safe and Effective Client Deduplication Method Based on Possession Proof

Abstract

The invention discloses a safe and effective client deduplication protocol based on proof of ownership, which belongs to the technical field of communication. The present invention includes: system initialization safety factor and parameter, client and key server communication obtain the key of encrypted file through blind signature, cloud server and client communication implementation challenge-response mechanism; Key server introduces Rate-limiting strategy, limits The number of times the client initiates requests to the key server within a certain period of time; the invention of this scheme resists exhaustive attacks and spoofing attacks, ensuring the security and efficiency of the proof-of-possession protocol; the invention can improve the efficiency of authentication and save storage space , guaranteeing 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 for the client to prove to the cloud server that it owns the entire data file instead of part of the data or a simple hash value of a file. 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-side deduplication means that the client judges whether the data is duplicated with the cloud server data w...

AI Technical Summary

Problems solved by technology

Judging whether the data is repeated using the above method brings a great security risk 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