фото показано с : bitcoints.com

By rights, it ought to be impossible to double spend tether, but that’s what happened on June 28 according to one Chinese cybersecurity firm.
Someone sent 694 tether to an exchange and was credited for the deposit due to a certain field value pertaining to the transaction being altered.
An Omni dev (whose blockchain tether operates on) has since confirmed this did occur, but was the fault of the exchange for poor integration, rather than a flaw in tether itself.
Still, the news has prompted at least one exchange, Okex, to issue reassurances that its exchange is safe from this bug.
Deanonymizing Zcash Transactions
While Brave users are gaining a degree of anonymity, a number of zcash users are losing theirs.

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