Powerful attacks on blockchains are increasing. So far this year, hackers have effectively executed a minimum of five separate “51-percent attacks” on cryptocurrency projects, with profits amounting to almost $20 million. This represents a remarkable increase in success, after renowned cybersecurity firm Group-IB recorded no completed 51-percent attacks last year. Group-IB has just released the full version of its annual report on trends in high-tech crime, which it has shared with Hard Fork. It showed that in 2018, hackers have pocketed $19.5 million worth of cryptocurrency and caused havoc for fledgling blockchains. The report also revealed cryptocurrency hackers went on a veritable…
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