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  • Rajesh Badam thinks this is interesting:

But why is maintaining integrity in distributed systems and purely distributed peer-to-peer systems in particular such a challenge? This step answers that question by discovering the subtle relation between trust and integrity of purely distributed peer-to-peer systems. As a result, this step will deepen your understanding of the importance of integrity and uncovers the major problem to be solved by the blockchain. Finally, this step describes the environment in which the blockchain is expected to provide the most value.