a16z Crypto has highlighted the impact of AI on the internet's trust system, which traditionally relies on the premise of "one account equals one person." The firm notes that AI is generating voice, video, and text at low costs, enabling mass "human-like" interactions that challenge this trust model. a16z suggests blockchain as a foundational solution, proposing decentralized "proof of personhood" mechanisms to increase the cost of mass impersonation and allow users to control their identities across platforms. Additionally, they advocate for the use of Layer 2 solutions and smart contracts to facilitate microtransactions and programmable payments at scale, while employing zero-knowledge proofs to balance verifiability and privacy.