THE BLOCKCHAIN: WHAT IT IS AND WHY IT MATTERS
The Blockchain is a secure transaction ledger database that is shared by all parties participating in an established, distributed network of computers. It records and stores every transaction that occurs in the network, essentially eliminating the need for “trusted” third parties such as payment processors. Blockchain proponents often describe the innovation as a “transfer of trust in a trustless world,” referring to the fact that the entities participating in a transaction are not necessarily known to each other yet they exchange value with surety and no third-party validation. For this reason, the Blockchain is a potential game changer.
Source: Brookings