this post was submitted on 11 Apr 2025
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This relies on everyone maintaining the chain though which there is nothing to force them into doing so.
Absolutely, but that's not really the point. If you remove the chain, then the file becomes untrusted. We're talking about attaching trust to an image, and a signature chain is how you ensure that that trust.
Couldn't you just start a new chain though from any point?
Yes, but starting a new chain would necessarily reallocate the ownership. So if
reuters.com
created a real image and then Alex Jones modified it, stripped the headers, and then re-created them, then the image would no longer appear to be from Reuters, but rather frominfowars.com
.