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This is the first protocol of its kind. It is the product of years of scientific research, advanced engineering, and diligent security work. Zcash is a group of scientists and hackers who came up with a way to combine blockchains for immutability with encryption for data security. These two things are separately well understood, important, and widely used, but they’ve never been put together before now. https://z.cash/blog/zcash-begins.html
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