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Please Stop
(jlai.lu)
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this post was submitted on 09 Mar 2024
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That is not a use for blockchain.
Say I want to say that I created an image. I could post that image's hash to a block chain, and point to it as something anyone can check.
But you already have to trust me for that to be valuable. So I can just host that hash in any of a myriad of conventional methods that are simpler, more performant, and less wasteful.
Your missing the history part. Obviously any signature in isolation is only as good as your knowlage of that person. Thats how cryptography has worked classically. A block chain is not just a hosting service. Of course that could be done cheaper. The point is to have imutable history of what information is provided. This allows a reputation system as well as the ability for parties to endorce or rebuke information in a way that can not be covered up later.
Trust requires reputation. No anonymous person in isolation can be trusted. The point is to allow collaborative verification with proof. And that can not be done by a centralized host or authority without giving that authority control over what is "true".
The only thing a malicious host can do is to omit information, which can be mitigated simply by using more than one host, which is still cheaper than using a blockchain. You could have each signature include the previous one, which will allow anybody to verify that they have a complete prefix of the history. Host them on, say Imgur and Imgchest, and it would even be free, whereas hosting it on say the ethereum blockchain would cost about 10$ per image (Based on this: https://etherscan.io/gastracker#costTxAction. I'm lowballing my estimate. If its too high, please tell me by how much, and how you arrived at your number.)
In other words, even in the best case scenario, using the blockchain would only provide negligible benefits compared to much cheaper alternatives.