Privacy-Preserving P2P Energy Market on the Blockchain

TL;DR

This paper proposes two privacy-preserving methods for a blockchain-based P2P energy marketplace, ensuring user load profile confidentiality while enabling secure transactions on a permissioned blockchain.

Contribution

It introduces two novel privacy-by-design approaches—UTXO coin mixing and trusted execution environments—for blockchain energy markets.

Findings

Both methods effectively protect user load data.

The approaches enable secure, private transactions on permissioned blockchains.

The solutions are practical for real-world energy trading applications.

Abstract

Quartierstrom creates a peer-to-peer marketplace for locally generated solar power. The marketplace is implemented as a smart contract on a permissioned blockchain governed by all prosumers. Two privacy-by-design concepts are presented which guarantee that the users individual load profile is not leaked to any third party despite using a blockchain. The first approach leverages UTXO based coin mixing protocols in combination with an account-based on-chain smart contract. The second approach relies on an off-chain smart contract running in trusted execution environments.