Blockchain technology was originally invented in 1991 by two mathematicians, Stuart Haber and W. Scot Stornetta. They first proposed the system to ensure that timestamps could not be tampered with.
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"A lot of it was done with just stuff that we had," says Walker, now a company director.
4. Are experts talking about it? There is always two sides to a story, and it’s important to see if anyone else is discussing it and putting their trusted opinion forward.