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The shortage of the central authority may make cryptocurrencies more secure. "It is hack-proof for the reason that there is no just one central place of failure," describes David Donovan, govt vice chairman at Publicis Sapient.Τη σήμερον ημέραν, τα κρυπτονομίσματα έχουν μετατραπεί σε ένα παγκ�