Walrus is quite particular about privacy. They didn't choose the easy route of full anonymity, which could cause trouble, but instead used the Seal tool to implement programmable access control—data is encrypted off-chain, while permissions and proofs are all stored on the Sui chain.

Numbers speak: since the update at the end of last year, decryption requests have exceeded 70,000. Applications like Alkimi Exchange process 25 million ad impressions daily, but users can only decrypt their own data. This mechanism directly addresses the trust issues in Web3 advertising.

What's interesting is that this is not just a technical issue but a transformation of the data economy itself. Data owners can set time locks or token tickets, turning passive storage into income-generating assets. Looking ahead, after Sui integrates AI frameworks in 2026, Walrus could become a verifiable data layer to help AI agents identify fraud.

If you're interested, you can try it out on Testnet by uploading small datasets to experience the Seal encryption process. Developers share quite a bit in the Discord community, which might inspire your next application idea.