Ask HN: Are there any substantial examples of blockchain solving a real problem?

Re:Ask HN: Are there any substantial examples of blockchain ... by xupybd on Sunday April 19, 2020 @06:43AM (#22914874)

I understand it can make for hard to tamper with historical data. For things such as temperature records of transported food and medical goods this can be very valuable. As you can have mobile record taking and storage. While having confidence that the data has not been altered.

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Re:Ask HN: Are there any substantial examples of blockchain ... by sparkie on Sunday April 19, 2020 @06:58AM (#22914944)

The problem here is that the ledger is public - and there exists few wholesalers who want their customers to learn who their suppliers are.

So the ledger must by design, anonymise each entity involved.

If you anonymise each entity, then every entity is Sybil.

You have no more confidence in anything than you would've had pre-"blockchain".

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Re:Ask HN: Are there any substantial examples of blockchain ... by Shmebulock on Sunday April 19, 2020 @06:52AM (#22914914)

While having confidence that the data has not been altered after being added to the blockchain.

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Re:Ask HN: Are there any substantial examples of blockchain ... by paulgb on Sunday April 19, 2020 @06:58AM (#22914941)

Reminds me of this: https://shkspr.mobi/blog/2018/06/how-i-became-leonardo-da-vi...

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Re:Ask HN: Are there any substantial examples of blockchain ... by paulgb on Sunday April 19, 2020 @06:51AM (#22914908)

To OP's question though, are there real-world cases of blockchain tech being used for this, or is it more of a hypothetical?

The reason I ask is that the security of Blockchain comes at a cost (both in additional complexity and, for PoW at least, energy use). Have people who need those records in the real world found the additional tamper-proofness worth the cost?

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Re:Ask HN: Are there any substantial examples of blockchain ... by xupybd on Sunday April 19, 2020 @07:05AM (#22914976)

https://www.ledgerinsights.com/blockchain-pharma-supply-chai...

It's been done. But has it really solved a problem? I'm not sure. Perhaps it's just better to use a simpler solution. A key on an iot device could sign every entry.

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Re:Ask HN: Are there any substantial examples of blockchain ... by louwrentius on Sunday April 19, 2020 @04:07PM (#22918400)

I can imagine so many conventional options that would be good enough though.

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