As a product manager, I often wonder: besides issuing tokens and trading NFTs, what real-world problems can blockchain solve? The biggest bottleneck is quite clear—there's a lack of convenient privacy tools.

Recently, I delved into Dusk's "XSC" (Confidential Smart Contracts) system and understood what they are doing. In simple terms, they have created a "privacy application engine" for developers.

What are the benefits? Developers no longer need to grapple with obscure cryptography papers. Dusk has already encapsulated the underlying PLONK zero-knowledge proof algorithm, allowing you to inject privacy capabilities into your dApp just like building with LEGO bricks.

Take on-chain surveys as an example. On a regular public chain, all answers are exposed, making the data essentially useless. But with XSC, it's different—I can set rules to let participants encrypt their responses, and the smart contract can automatically aggregate data like "how many people have an annual income over 500,000," and even generate encrypted proofs. The coolest part is that everyone can verify the credibility of this statistical data, but no one can see any individual participant's specific answers.

Once this "verifiable privacy aggregation" module is set up, it can be reused in countless scenarios such as voting, auctions, credit scoring, and data mining.

The positioning of Dusk tokens is very clear: deploying and running privacy contracts costs DUSK, and users paying for privacy transaction fees also use DUSK. The entire economic model forms a closed loop.