AudiWFlow: Confidential, collusion-resistant auditing of distributed workflows

We discuss the problem of accountability when multiple parties cooperate towards an end result, such as companies in a supply chain or departments government service under different authorities. In cases where fully trusted central point does not exist, it is difficult to obtain audit trail workflow each individual participant unaccountable all others. propose AudiWFlow, auditing architecture that makes participants accountable for their contributions distributed workflow. Our scheme provides confidentiality most cases, collusion detection, and availability evidence after terminates. AudiWFlow based on verifiable secret sharing real-time peer-to-peer verification records; further supports levels assurance meet desired trade-off between overhead resulting from approach. evaluate two implementation approaches AudiWFlow. The first one except auxiliary that, nevertheless, needs only low level trust. second smart contracts running public blockchain, which able remove need any but requires integration with blockchain.