Blockchain @ IBM Research – Zurich       

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Blockchain @ IBM Research – Zurich - overview


What is blockchain?

A blockchain is a continuously growing list of records, which are grouped into blocks and maintained in a distributed way. In a blockchain, each block contains a cryptographic hash of the previous block, which prevents changes to existing blocks at a later point in time. In conjunction with protocols for distributed consensus, blockchains are currently used as platforms to support global business transactions.