The community's 'nodes' — consumers jogging the bitcoin software on their own personal computers — collectively Look at the integrity of other nodes to ensure that nobody spends a similar cash two times. All transactions are printed on a shared community ledger, called the 'block chain.' ^ Opposite to contracts, https://sibergvenlik59582.tkzblog.com/25511547/not-known-factual-statements-about-siber-güvenlik