  We analyzed the associations between Bitcoin transactions and addresses to
cluster address and further find groups of addresses controlled by the same
entity. It revealed the vulnerabilities of Bitcoin anonymity mechanism, which
could be used by the law enforcement agencies to track and crack down illegal
transactions. However, single heuristic method and incomplete heuristic
conditions were difficult to cluster a large number of addresses
comprehensively and accurately. Therefore, this paper reviewed a variety of
heuristics, and used multiple heuristics comprehensively to cluster addresses
to improve the degree of address aggregation and address recall rate, which
laid a foundation for further inferring of entity identity.
