A few days ago, the Sui network released the Seal white paper, and the blockchain-native "programmable privacy" is really about to be implemented. The document explains it quite clearly—the combination of threshold encryption, an independent key server network, and on-chain Move strategies allows data to achieve "encryption-first, fully programmable access permissions." In simple terms, developers write rules using smart contracts: who can view, when they can view, and automatic destruction once conditions are met. The entire process requires no trust in any third party. On-chain policies and auditability are key points.

As the most mature decentralized storage solution in the Sui ecosystem, Walrus has become the best "storage partner" for Seal. Walrus uses RedStuff erasure coding technology, which is quite interesting—only 4 to 5 times replication factor is needed to achieve ultra-high data availability, even if 2/3 of the nodes fail, data can still be recovered. Storage costs are much lower than traditional centralized solutions, and read speeds are comparable to CDN.

Even more interestingly, Walrus directly converts uploaded files into programmable Blob objects on Sui. When used with Seal, encrypted data stored in Walrus is controlled by Seal, turning static files into active on-chain assets. Features like automatic expiration, conditional paid subscriptions, and data monetization are supported. Especially in the wave of AI, this combination has a lot of imaginative potential.