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Notes

Short notes on crypto x AI systems, market structure, and product constraints that matter in practice.

x402 Lives on a Money-Transmission Boundary

x402 Lives on a Money-Transmission Boundary

x402 looks thin at the protocol edge, but the facilitator role sits close to the point where signed authority becomes executable transfer, which is where money-transmission questions begin to matter.

Mar 31, 20263 min
Google's Repricing of Eliptic-Curve Cryptography

Google's Repricing of Eliptic-Curve Cryptography

Google did not discover a new way to break elliptic-curve cryptography. The algorithm is unchanged. What changed is the price. The operational cost to execute a discrete logarithm attack on ECDLP-256 dropped by roughly 20x in physical-qubit requirements, and that single repricing is enough to move the security horizon for every system that ever trusted a secp256k1 signature.

Mar 31, 20263 min
Who Decides Whether a Mandate Clears?

Who Decides Whether a Mandate Clears?

A mandate does not dissolve trust. It relocates it across credential providers, registries, issuers, and challenge systems, each holding a different slice of the acceptance decision.

Mar 30, 20265 min
SNARKs vs STARKs for Inference

SNARKs vs STARKs for Inference

For inference, SNARKs and STARKs sit on different parts of the verifier path. SNARKs usually win where proof size and verification cost are tight. STARKs usually win where the proving core needs transparency and room to scale. What keeps showing up in production is a hybrid path (STARK-style proving, SNARK-style settlement compression)

Mar 30, 20264 min