What about a system that saves in some way the hash in a Blockchain, and if you, eg, XOR the hash of the video with the hash of the previous block you will "certainly" know that the video was created between the previous block and the block where the hash is saved in. That's a starting point.
it does something, sometimes. it pushes the required fabrication timeline back.
if it is mandated that every photo or video taken for the possible use in evidence is notarized at the time of acquisition, any fabrication would necessitate total premeditation. that is, the fabricators would need to know ahead of time what they were pursuing and what evidence they would need. this seems like a very costly barrier.
for example, altering security footage would require some fantastical elements: a real-time system of ingesting real footage and altering it in real-time to slip it into the notarization pipeline within the error margins.
requiring that any equipment that produces acceptable evidence stream commitment hashes in real-time to public append-only repositories would be an enormous step forward.
Like when people discuss voting, I believe a blockchain [0] is a terrible pitfall compared to a classic distributed database system of predefined nodes run by different organizations. For example, imagine a couple hundred predefined nodes run by different states, federal agencies, etc.
An attacker altering the ledger would still require compromising an unreasonably large number of independent groups at once, and even then the rest would be able to clearly see that some unusual and suspicious event occurred.
By limiting membership a bunch of problems simply vanish, like long-clearing times, wasting hardware on mining, vulnerability to foreign botnets, etc.
[0] A blockchain is distinguished by its core requirement, from which a cascade complexity flows: Uncontrolled node membership. Don't be fooled by people pitching "private blockchain", its a contradiction in terms designed to rehabilitate hype, like "multi-sample Theranos test" or a bicycle as "Segway passively stabilized inline wheel model."
You just described IBM's whole Hyperledger Fabric thingy. I worked with it once upon a time, with the biggest insurance companies in my country where they plus a regulator all ran nodes.
"To be clear, this is not a cyber incident. Fiverr does not proactively expose users' private information. The content in question was shared by users in the normal course of marketplace activity to showcase work samples, under agreements and approvals between buyers and sellers. This type of content requires the buyer's consent before it can be uploaded. As always, any request to remove content is handled promptly by our team."
I also commented this, but I have to say their statement is false.
The links to all the delivered projects are publicly accessible. I went over my orders and I could open every single one from another device, not logged in.
> It doesn’t matter what’s technically possible- in fact, a computer that works too fast might be viewed as suspicious. Taking a while to give a result is a kind of proof of work.
In recent times I found myself falling for this preconception when a LLM starts to spit text just a couple of seconds after a complex request.
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