DeepAI AI Chat
Log In Sign Up

Sunspot: A Decentralized Framework Enabling Privacy for Authorizable Data Sharing on Transparent Public Blockchains

11/06/2021
by   Yepeng Ding, et al.
0

Blockchain technologies have been boosting the development of data-driven decentralized services in a wide range of fields. However, with the spirit of full transparency, many public blockchains expose all types of data to the public such as Ethereum. Besides, the on-chain persistence of large data is significantly expensive technically and economically. These issues lead to the difficulty of sharing fairly large private data while preserving attractive properties of public blockchains. Although direct encryption for on-chain data persistence can introduce confidentiality, new challenges such as key sharing, access control, and legal rights proving are still open. Meanwhile, cross-chain collaboration still requires secure and effective protocols, though decentralized storage systems such as IPFS bring the possibility for fairly large data persistence. In this paper, we propose Sunspot, a decentralized framework for privacy-preserving data sharing with access control on transparent public blockchains, to solve these issues. We also show the practicality and applicability of Sunspot by MyPub, a decentralized privacy-preserving publishing platform based on Sunspot. Furthermore, we evaluate the security, privacy, and performance of Sunspot through theoretical analysis and experiments.

READ FULL TEXT

page 1

page 2

page 3

page 4

03/23/2021

TrustCross: Enabling Confidential Interoperability across Blockchains Using Trusted Hardware

With the rapid development of blockchain technology, different types of ...
03/01/2021

A Note on Privacy in Constant Function Market Makers

Constant function market makers (CFMMs) such as Uniswap, Balancer, Curve...
10/16/2020

Multi-Shard Private Transactions for Permissioned Blockchains

Traditionally, blockchain systems involve sharing transaction informatio...
10/02/2020

AMR:Autonomous Coin Mixer with Privacy Preserving Reward Distribution

It is well known that users on open blockchains are tracked by an indust...
02/13/2018

RoboChain: A Secure Data-Sharing Framework for Human-Robot Interaction

Robots have potential to revolutionize the way we interact with the worl...
10/27/2018

A privacy-preserving system for data ownership using blockchain and distributed databases

Blockchain has the potential to revolutionize the way we store, use, and...
11/04/2018

Genie: A Secure, Transparent Sharing and Services Platform for Genetic and Health Data

Artificial Intelligence (AI) incorporating genetic and medical informati...