The health bands, watches, rings you use every day are constantly collecting your body data—heart rate, sleep, exercise, blood sugar… Where do these most private pieces of information actually reside?

Most of the time, they are stored on the cloud servers of a major internet company. Sounds a bit creepy, right? If there’s a data breach, server attack, or if the company mismanages or even goes bankrupt, your health data could be packaged and sold. Not to mention those inexplicable privacy policy clauses.

So the question is straightforward—can we truly control our own data destiny?

The answer is yes. The concept of decentralized storage completely reverses the traditional cloud service model. Take protocols like Walrus as an example: instead of storing your data in one centralized location, it encrypts your data first, then disperses it across a network of independent nodes around the world, like puzzle pieces. Even if most nodes fail, the remaining nodes can fully restore your data. Under this architecture, there is no centralized “data vault,” eliminating single points of failure.

What does this mean for health data? It means your private information truly belongs to you. You have full control over permissions—store it how you want, share it with whom you want, and even generate economic value through data authorization. For example, some health device manufacturers are already adopting this approach, allowing users to securely and freely share their health data.

This is the practical application of Web3 in daily life—not a hype about crypto trading, but returning data sovereignty to users.