What is the actual application scenario of blockchain now?

The application scenarios of blockchain from now to the actual situation are:

1, the pain point of traditional information * * *

Either the information is distributed by a unified center, or it is reconciled in batches on a regular basis (usually once a day), so it is difficult to enjoy the timely information in real time.

It is difficult to determine whether the received information is sent by the other party due to the lack of mutual trust communication between the two parties who enjoy the information.

2. Blockchain+Information * * *

First of all, the blockchain itself needs to maintain the data consistency of each node, which can be said to have its own information sharing function; Secondly, the real-time problem can be realized by P2P technology of blockchain; Finally, a secure and reliable information sharing channel can be constructed by using the tamper-proof and * * * knowledge mechanism of blockchain.

You will have such a question: To solve the above problems, I can build an encrypted channel by myself without blockchain technology! But I want to say that since blockchain technology can solve these problems and it is very convenient to add nodes, why not use blockchain technology before you build a safe and reliable information sharing system?

3. Application case

Give Tencent's own application-public welfare tracing chain and the value of blockchain in information enjoyment. Bitcoin solves the trust problem of currency in issuance and accounting. Let's take a look at how Bitcoin solves the above two problems one by one.

Spamming problem: Bitcoin can only be obtained by mining, and the total number of bitcoins is 2 1 10,000, which solves the problem of currency spamming in the issuance process; Account book modification problem: Bitcoin transaction records form a network through chain storage and decentralized global nodes to solve the account book modification problem.

Chain storage can be simply understood as: the blocks that store records one after another form a chain; The records of all blocks except the first block contain the check information of the previous block. Changing the information of any block will lead to the check error of subsequent blocks. Because of this correlation, other blocks cannot be inserted in the middle, so it is difficult to modify existing records.