coinbase
onchain payments need privacy to prevent leaking browsing history metadata
Currently X402 transactions are related to making payments using stablecoins. Unfortunately this creates a high correlation probability that a payment from the same wallet address matches the agent's (or browsers in the case of agentic browsing) history. This means the browsing history is effectively leaked onchain for every site it visits and makes an x402 payment to. Additionally, it means the businesses could be reporting realtime traffic data (depending on usage e.g. a news site using this as a paywall), which then can be used to potentially deduce the revenue generation of the business in realtime based just on usage + onchain data. For private and small businesses, this isn't information they want share. Even publicly held companies are very careful about their reporting of financial data to shareholders, so this should be addressed.
In order to solve this, we need built in privacy guarantees by the protocol and the payment or we risk leaking a lot of metadata simply based on the transactions on chain. By default to achieve this we need sender anonymity, recipient anonymity and transaction amount anonymity in order to prevent this leakage.
X402 should specify how this should work, especially if payments are occurring through a swap or bridging infrastructure provider to swap from one stablecoin to another or across chains.
I am thinking in the world with so much fake data showing false success I would say this is great feature. Finally you could see what someone is making and know the truth, not see false screenshots, false PRs or marketing showing success while under all that companies are rotten and dieing off taking other ppls lives with them.
Are you saying we should coerce everyone to publish their bank accounts and browsing histories? If that’s the case, please lead by example and publish yours for review first. I for one don’t intend to do that because I don’t believe it’s beneficial.
Also, adding privacy by default doesn’t mean that everyone has to use it, just that it’s the default choice for people to start from. Buyers and sellers can choose to opt out of privacy if they wish just as you can today by publishing your info. However, if the protocol makes privacy an optional add-on it will mean only those who can afford it or have the technical skills to achieve it will get privacy.
yeah you are right. would opt out for privacy for individuals but for legal entities to be public with info. but this should be privacy first for all, as you can only make it like that and then make some cryptographic proofs for legal entities to verify their data is credible and true.
@kdenhartog totally agree privacy is going to be essential as stablecoin payments scale, for exactly the reasons you state.
As of right now most chains do not have scalable private payment mechanisms, but almost all of them are currently developing them. When it is clear what approaches are the most viable x402 will absolutely adopt. That being said, privacy will never be uniform as x402 aims to cast a wide net and is not tied to any specific blockchain. Businesses will always be free to choose the networks & schemes that most align with their preferences for payments.
