What Is a Blockchain?

Simply put, a blockchain is a group of records of activity (called blocks), “chained” together over time to form a historical record of that activity. Blockchains, because of their reliance on cryptography for encoding records, are incredibly secure; since blockchains are created using distributed apps on multiple computers, alteration of these records becomes virtually impossible (contrasted to a more vulnerable centralized server). 

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  1. Yutai

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