A Privacy-Preserving KYC-Compliant Identity Scheme for Accounts on All Public Blockchains

Cryptocurrencies have the potential to enable socioeconomic growth throughout world by offering easier access capital and financial services. However, many virtual asset service providers (VASPs) that offer cryptocurrency services lack identity management can be accessed anonymously, which has led their being exploited criminal activities such as money laundering illegal foreign exchange. Such crimes a negative impact on sustainability. Building systems blockchains help VASPs improve combat cryptocurrency-based so better serve social economy achieve sustainability goals. existing solutions privacy problems because provider associate users’ identities with wallet accounts. In addition, there is currently no solution support all public unconditionally, current only EVM-compliant or require additional work new blockchains. This article proposes KYC (know your customer)-compliant scheme based Ethereum using Merkle trees smart contracts. The accounts are linked user rather than so, in general, one but knows association between identity, protects privacy. For suspicious accounts, supervisors trace thus supervision. supports identifying contracts bind multiple extra required. Moreover, users prove attributes meet requirements of adopting BBS+ signature Sigma protocol.