a16z crypto show
from: a16z crypto show
a16z crypto, Robert Hackett, Sonal Chokshi
PUBLISHED: APR 17, 2026INDEXED: APR 18, 2026, 6:01 AM

How Bots, Deepfakes and AI Agents Are Forcing a New Internet Identity Layer

Key Takeaways

  • AI agents demand new human verification layers

    Proof of Human, as the name suggests, is do you know if you interact with a human or something else on the Internet? And I actually think the kinds of questions that we're now asking is, are you interacting with a human, an agent on behalf of a human, or just an agent? I think these are roughly the three areas that we want to split apart.

    Alex Blania
  • Digital history is easily faked by AI

    An AI will be able to have a GitHub account, and will be able to post and own an account, and also attest to five other AIs that these are in fact humans, even though they're not. We disregarded Web of Trust basically immediately because we assumed that eventually everything that is just digital and AI will be able to do as well.

    Alex Blania
  • Government IDs fail global identity needs

    What is so hard about this problem is it's going to be a global problem. And so it doesn't really matter if one government maybe has the perfect infrastructure. Singapore is an example of a government that has perfect infrastructure, but that barely matters because Meta is a global product with three billion users and a lot of other countries.

    Alex Blania
  • Iris biometrics provide necessary mathematical uniqueness

    To solve the proof of human problem, you will need to distinguish one new individual from all previous individuals. You need to make sure that Ben is trying to sign up, and Ben did not sign up before. Then you can just do the math, and you can calculate how much mathematical entropy do you need to prove that? It turns out that's a pretty high number.

    Alex Blania
  • Custom hardware prevents biometric replay attacks

    We went down, if you know World, you know that we have built this thing called an orb. It's doing a lot of things to prevent these kinds of attacks. For example, it has multiple sensors in the electromagnetic spectrum to just make sure that you cannot show a display to it and it would recognize that.

    Alex Blania
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Episode Description

Ben Horowitz and Erik Torenberg speak with Alex Blania of Tools for Humanity about World and the growing need for proof of human verification online. They discuss the challenge of proving human uniqueness at scale, the privacy model behind World ID, and why platforms from social media to dating apps to video conferencing may soon need stronger ways to verify that users are real people.

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