FileDES: A Secure Scalable and Succinct Decentralized Encrypted Storage Network

TL;DR

FileDES is a novel decentralized encrypted storage network that enhances data privacy, scalability, and proof efficiency through innovative proof and verification methods, outperforming existing systems in various network conditions.

Contribution

We introduce FileDES, a decentralized encrypted storage system with scalable proofs and batch verification, addressing privacy and efficiency challenges in existing decentralized storage networks.

Findings

FileDES achieves higher proof verification efficiency than existing systems.

It demonstrates improved scalability and storage cost reduction in large geographically dispersed networks.

The system effectively resists Sybil and Generation attacks while maintaining data availability.

Abstract

Decentralized Storage Network (DSN) is an emerging technology that challenges traditional cloud-based storage systems by consolidating storage capacities from independent providers and coordinating to provide decentralized storage and retrieval services. However, current DSNs face several challenges associated with data privacy and efficiency of the proof systems. To address these issues, we propose FileDES (\uline{D}ecentralized \uline{E}ncrypted \uline{S}torage), which incorporates three essential elements: privacy preservation, scalable storage proof, and batch verification. FileDES provides encrypted data storage while maintaining data availability, with a scalable Proof of Encrypted Storage (PoES) algorithm that is resilient to Sybil and Generation attacks. Additionally, we introduce a rollup-based batch verification approach to simultaneously verify multiple files using publicly verifiable succinct proofs. We conducted a comparative evaluation on FileDES, Filecoin, Storj and Sia under various conditions, including a WAN composed of up to 120 geographically dispersed nodes. Our protocol outperforms the others in terms of proof generation/verification efficiency, storage costs, and scalability.