Balancing privacy and accountability in digital payment methods using zk-SNARKs

In this paper we propose and implement a digital permissioned decentralized anonymous payment scheme that finds a balance between anonymity and auditability. This approach allows banks to ensure that their clients are not participating in illegal financial transactions, whilst clients stay in control over their sensitive, personal information....

Efficient Compiler to Covert Security with Public Verifiability for Honest Majority MPC

We present a novel compiler for transforming arbitrary, passively secure MPC protocols into efficient protocols with covert security and public verifiability in the honest majority setting. Our compiler works for protocols with any number of parties > 2 and treats the passively secure protocol in a black-box manner. In multi-party computation ...

Governance and business models of blockchain technologies and networks