The shortage of a central authority can also make cryptocurrencies more secure. "It's hack-proof mainly because there's no one central point of failure," describes David Donovan, government vice chairman at Publicis Sapient. Εάν δεν είσαι φίλος του γραπτού λόγου τότε μπορείς να δεις το : εάν αλλάξετε ένα μπλοκ, αλλάζει https://ralphh047aho9.eveowiki.com/user