Why Blockchain Will Survive, Even If Bitcoin Doesn’t (WSJ)

What is blockchain? It’s essentially a secure database, or ledger, spread across multiple computers. Everybody has the same record of all transactions, so tampering with one instance of it is pointless. Already, 1.1 million items sold or on sale at Walmart are on a blockchain—including chicken and almond milk—helping the company trace their journey from manufacturer to store shelf. Global shipping giant Maersk uses the same technology from IBM to track shipping containers, making it faster and easier to transfer them and get them through customs.

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