supported by the Fujian Key Labo-ratory of Financial Information Processing(Putian University)(No.JXC202304);Yunnan Key Laboratory of Block-chain Application Tech-nology(No.202305AG340008);the Opening Project of Nanchang In-novation Institute,Peking University(No.NCII2022A02);Science and Technology Project of Putian City(No.2021R4001-10).The work of K.-K.R.Choo was supported only by the Cloud Technology Endowed Professorship.
Blockchain-based cryptocurrencies,such as Bitcoins,are increasingly popular.However,the decentralized and anonymous nature of these currencies can also be(ab)used for nefarious activities such as money laundering,thus...