Detection of Blockchain Transactions Used in Blockchain Mixer of Coin Join Type

This paper is devoted to both the detection of transactions that can participate in money laundering schemes and the possibility of modification of payment systems based on blockchain technology in the interests of AML/CFT. In the process of work, the research of transaction anonymization method with the use of a decentralized approach based on Coin Join transactions is performed. Also, methods of tracking such transactions, the possibility of their deanonymization and the ability to determine the relationships between users and their transactions are examined. The results show that tracking Coin Join transactions is a feasible task that allows to determine the fact of user participation in the creation of a transaction, which gives additional advantages in the process of detecting transactions involved in money laundering schemes.