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A comment on NIST: Blockchain Technology Overview [pdf]. Parent comment

Re:NIST: Blockchain Technology Overview [pdf] by dreamcompiler on Sunday October 07, 2018 @06:28PM (#18162956)
Git is not a secure blockchain. It's quite easy to rewrite history in git to change the true order of events (after all, that's the whole purpose of rebase). A true blockchain has to be protected by cryptographic signing protocols; git is not.
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Re:NIST: Blockchain Technology Overview [pdf] by darawk on Sunday October 07, 2018 @08:02PM (#18163295)
A) What is your point?

B) Git is perfectly secure if you don't accept pushes.

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Re:NIST: Blockchain Technology Overview [pdf] by dreamcompiler on Sunday October 07, 2018 @09:05PM (#18163494)
My point is that it cannot solve the problems a blockchain can. You could not build a digital currency on git.
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Re:NIST: Blockchain Technology Overview [pdf] by darawk on Monday October 08, 2018 @01:49AM (#18164440)
Cryptocurrencies are just git + proof of work. Git, on its own, is a blockchain. Adding proof of work to a blockchain solves the timestamping problem, which allows you to use that blockchain as a currency (i.e. prevent double spends). Many times that property is useful (more than just in currencies, e.g. trading stocks), but not always, and it is not an essential property of a 'blockchain'.
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