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The dearth of a central authority may also make cryptocurrencies safer. "It can be hack-proof due to the fact there's no just one central position of failure," clarifies David Donovan, govt vice chairman at Publicis Sapient.Εάν μπορεί ο οποιοσδήποτε να δημιουργήσει ένα μπλοκ, τι τον εμποδίζε�