May be a bit wise to point to something other than the Wikipedia page before claiming I don’t knowing something about an entire topic.

You seem to be intentionally or otherwise completely missing what I’m saying. PGP just establishes ownership of a private key. It doesn’t say anything about that person then choosing to sign the output of GPT or giving GPT that private key to do whatever with. And GPT can mimic whatever writing style you give it. Not hard to imagine giving it various writing samples of yours personally to learn from and imitate. So please explain how web of trust solves anything for that. Aside from trying to keep track which person in your personal network is a spam vector, because there are super connectors with thousands or tens of thousands of real-world contacts and logistically that’s not realistic to manage since most people aren’t cryptography nerds.

There’s also a bigger fundamental problem with web of trust in applying it here. Trust is not binary in that way. If I trust person A and they trust person B, trust isn’t a transitive property so in reality there’s nothing we can say about my trust about B. Also, trust isn’t binary. If I trust person A about specific science topics, that doesn’t mean that trust extends to other topics. Trust also isn’t static and sticky whereas it is generally treated as such in computer systems where trust needs to be scores and revoked automatically somehow (and then we’re back to an AI war to detect abuse and better GPT to avoid the abuse). This is also ignoring that trying to model human trust webs with a CS model that doesn’t work anything like it, isn’t a good recipe for success. Also, human trust webs have massive trust and scaling problems) (cough Theranos, WeWork, FTX, Madoff, etc etc). Notice how web of trust always sticks to basic cryptographic primitives which are easy to write papers about and solve academically but not a solved problem by any means in terms of defining what trust actually means or how a web of trust works in terms of AI content. Obviously PGP has been around forever and AI is a bit newer so maybe there will be interesting work coming out of this space at some point. AFAIK today web of trust buys you bupkis in terms of fighting GPT spam. I would recommend reading up any number of articles that discuss why pgp and signing parties failed. It’s not purely a UX issue. The bigger problem is that even in a “trusted” system, fraud arises spontaneously because it’s the prisoner’s dilemma problem - there’s a material advantage to perpetrating the fraud and there’s a better advantage to helping perpetrate fraud (much hard and longer political process to revoke that trust).

As a more concrete practical demonstration of this failure. Consider that certificate authorities, which are assumed to be “trusted core signatories” in a PKI system. A PKI systems is actually the same as a “web of trust”, it’s just that I delegate verification to a third party. As cryptocurrencies should have shown, people still prefer having a virtual account in a bank to manage those funds/ lower fees. Similarly, people will outsource the complexity of validating identities (CAs signing carts for websites). CAs have repeatedly abused this to the point where afaik the security community generally acknowledges that CAs are generally worthless - even the “good ones” struggle to do verification at scale and there’s so many CAs in typical lists that it’s basically guaranteed that there are malicious actors. And we know decentralization doesn’t actually work for end users because it’s too complicated a mental model. People want a named intermediary that they delegate responsibility to. That’s why most people defer their CA validation to browsers and operating systems. PGP would work similarly so now you’ve got people delegating key trust to Apple,
Microsoft, Google, Signal, etc etc. and nerds who use open source verified key managers and maintain their own infra to manage these lists. But that’s not a representative sample of what end users will accept at scale. So you’re back to centralized control, which will be better than status quo as OSes and browsers realistically are more resitant to handing out broken signatures. And of course maybe better algorithms and methods will be developed to solve these shortcomings.

But a lot of these issues have existed and been documented for a long long period of time independent of the vague idea of using it as a GPT detector / blocked. I’ve been around the Bay Area for 10+ years and I remember having friends who thought this would take off any day now and worked really hard to make it happen, hosting signing parties and whatnot. It didn’t and I was pretty confident it was a pure nerd activity that wouldn’t have any impact in its current form (regardless of the UX challenges - the problems are much more fundamental and worse). Web of trust is seriously hard even in the simplest possible state which is PGP and that’s failing miserably despite being around for a very long time.

Would you agree that it’s on you to provide some supporting evidence on the claim that

A) I don’t know what I’m talking about

B) something more than hand waving “sprinkle some decentralized cryptography here” and actually explain how you solve the human problems that are so important here + why PGP has largely failed but suddenly it’s going to find a second life in GPT prevention.