Immutable

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Immutable is an unchanging over time or unable to be changed1) “Immutable”, Lexico, Oxford English Dictionary, 28 June 2018, . The immutability property of a blockchain refers to the fact that any data once written on the blockchain cannot be changed. 2) “Blockchain Technology Explained: Introduction, Meaning, and Applications”, Mayank Pratap, 1 August 2018, Hackernoon, https://hackernoon.com/blockchain-technology-explained-introduction-meaning-and-applications-edbd6759a2b2