Reflow: Zero Knowledge Multi Party Signatures with Application to Distributed Authentication
This addresses the need for secure, scalable distributed authentication in applications like material passports for accounting systems.
The paper tackles the problem of creating unlinkable multi-party signatures with zero-knowledge credentials, resulting in a system that integrates with blockchains and graph databases to ensure confidentiality and authenticity, even when authorities are offline, and can scale to thousands of participants.
Reflow is a novel signature scheme supporting unlinkable signatures by multiple parties authenticated by means of zero-knowledge credentials. Reflow integrates with blockchains and graph databases to ensure confidentiality and authenticity of signatures made by disposable identities that can be verified even when credential issuing authorities are offline. We implement and evaluate Reflow smart contracts for Zenroom and present an application to produce authenticated material passports for resource-event-agent accounting systems based on graph data structures. Reflow uses short and computationally efficient authentication credentials and can easily scale signatures to include thousands of participants.