The private key is the core of our digital world because it is our account, our avatar in the digital world, and it represents us in interacting with the digital world.

We can declare our sovereignty in the digital world through signing and encryption. I found or created a beautiful piece of data, and I want to make it public so that everyone can share my joy. Then I sign the data to prove that I found or created it first, and then make the data public. No one can deny this result (this is the autonomous expression of intellectual property in the digital world). I don't want to make this data public, so I encrypt it, so that no one knows what the data is. These encrypted data are stored on a decentralized storage system such as ipfs, and the user data files are permanently stored through smart contracts. In this way, my data will never be lost. Through these two methods of encryption and signing, we have established it in #数字世界中的安全屋 , because no one can forcibly break through the wall built by cryptography without my permission. With such a safe house that we fully control, we can store anything precious in it without being peeped by others, let alone being stolen by others.

With our own safe house, we can explore and experience the infinite digital world without any worries. We can record every bit of our lives and what we see and hear, which is our diary and photo album; we can issue our own digital assets, which is the embodiment of our identity value or creative value; we will establish connections with our friends, which is our address book; we interact with friends, which is chat records and Moments. We can also connect to other network services, which is our password box; we can also connect to all public chains, which are our various wallets. All of this is under the control of the private key to ensure safety.

It can be said that in the real world, building a safe house with iron walls is extremely expensive and not affordable for ordinary people. And even if you invest more, you can't completely guarantee safety. Various natural disasters, violence, and even human errors can destroy this safe house with iron walls. But in the digital world, with the most advanced technology, everyone can have a real safe house of their own, and it is almost free. With the development of technology, we may live in the digital world. This safe house can be a place for us to relax and rest our spirits, and become a new home for our souls. Remember the metaphor we made before? #一个私钥就是宇宙中一个原子的地址，掌握私钥才能找到这个原子 . A grain of sand is a world, and an atom is also a world. As long as you keep your private key well, this atomic world can become the home of our souls. Here, our souls are at peace.