Anonymity of the cryptocurrency Zcash has vulnerabilities. This is indicated by some patterns in the implementation of transactional operations. This was reported by researchers from the University College of London: George Kappos, Haaroon Yousaf, Mary Maller and Sarah Meiklejohn.

The researchers claim that 69.1% of confidentiality is lost as the coins move from "unprotected" to "protected" recipients and to their original location. We remind you that Zcash is considered a promising anonymous cryptocurrency, which has two types of addresses: "T-addresses" are transparent and unprotected, balances on them and transactions with their participation are publicly available; and protected "Z-addresses", which have no universal available access. Transactions between T-addresses are almost completely public, and the ones between Z-addresses have a high degree of anonymity. Experts note a decrease in the confidentiality of transactions that occur between different types of addresses, which provides an opportunity to obtain information about Z-addresses. Such an opportunity was formed by tracking the behavioral factor of users.

"Our heuristics would have been significantly less effective if the founders interacting with the pool behaved in a less regular fashion," they write. "In particular, by always withdrawing the same amount in the same time intervals, it became possible to distinguish founders withdrawing funds from other users."