# Towards Blockchain-based Auditable Storage and Sharing of IoT Data

## TL;DR

This paper proposes a blockchain-based system for secure, auditable, and decentralized storage and sharing of IoT data, addressing data silos and empowering user data ownership.

## Contribution

It introduces a novel blockchain-enabled architecture for IoT data management that decentralizes access control and integrates edge storage with blockchain technology.

## Key findings

- Enables secure, auditable access control for IoT data.
- Supports decentralized storage at the network edge.
- Empowers users with data ownership and control.

## Abstract

Today the cloud plays a central role in storing, processing, and distributing data. Despite contributing to the rapid development of IoT applications, the current IoT cloud-centric architecture has led into a myriad of isolated data silos that hinders the full potential of holistic data-driven analytics within the IoT. In this paper, we present a blockchain-based design for the IoT that brings a distributed access control and data management. We depart from the current trust model that delegates access control of our data to a centralized trusted authority and instead empower the users with data ownership. Our design is tailored for IoT data streams and enables secure data sharing. We enable a secure and resilient access control management, by utilizing the blockchain as an auditable and distributed access control layer to the storage layer. We facilitate the storage of time-series IoT data at the edge of the network via a locality-aware decentralized storage system that is managed with the blockchain technology. Our system is agnostic of the physical storage nodes and supports as well utilization of cloud storage resources as storage nodes.