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Speaking of blockchain uploading, this is actually an introductory knowledge in the blockchain field. As we all know, blockchain technology is the underlying technology of virtual cryptocurrencies such as Bitcoin. Blockchain technology securely stores data through decentralized data records. Its characteristics are that it cannot be forged, cannot be tampered with, is traceable, and anonymous. If we talk about the essence of blockchain, it is actually a distributed database. In addition to being physically distributed, it is also logically distributed, and the records in it are all data. Many investors want to know what it means to be on the blockchain? Let the editor of the currency circle explain blockchain on-chain in a simple way.

 What does it mean to be on the blockchain?

The earliest blockchain, the BTC block, mainly contains the recorded BTC transaction data. Yes, in each of its blocks, there are really records of transfer transactions, which means that the currency BTC is only recorded in the blockchain as a kind of data.

Although it is not a prerequisite for the blockchain itself, it is an indispensable part of the blockchain system because it is relied upon to promote the generation of new blocks (that is, mining). Because data is recorded in blocks, if no new blocks are generated, new data cannot be recorded, and the entire blockchain will almost lose its life. (Why do I say almost, because the data that has been uploaded to the chain is still valuable, equivalent to a reliable archive), so each current blockchain basically has its own currency, so that many novice users directly use Blockchain and currency are equated.

Satoshi Nakamoto preserved this event permanently in the first blockchain. This can be regarded as the originator of some BTC engraving services later. The main function of the blockchain is to ensure that the data on it is not tampered with. Now we usually check whether the data has been modified by making a hash summary such as md5 on the original data, and then comparing the before and after summary values to determine whether the original data has been modified. And the hash value is a very small string (md5 is 32 bytes, sha1 is 40 bytes), which can be written into the block.

 Introduction to the role of blockchain on-chain

Blockchain can solve the problem of authenticity of data on the chain, not that it is tamper-proof, but that the cost of tampering is extremely high, which leads to no tampering. However, it cannot solve the problem of accuracy before data is uploaded to the chain. This is not just a problem faced by blockchain technology. It is a problem faced by all technologies, so it cannot be solved by blockchain alone.

Another one is how to ensure that data is not missed in every link during the data uploading process? If there is a human factor in it, it is easy to make mistakes, omissions, or tampering. This requires combining other technical means to help us accurately transfer data to the block.

Data uploading refers to the process in which users encrypt and upload their own data to the public network side chain based on IPFS, and form a data index in the public trust chain. Once the data is uploaded to the chain, no individual or organization will be able to obtain your data except for your own Data_key authorized decryption, thus ensuring the absolute security of the data.

The above content is the currency circle editor’s popular explanation of what blockchain on-chain means. In fact, for individuals, data is an asset. Everyone's data contains huge value, and the economic benefits generated during the use of data can also be directly fed back to the users themselves. After the data is uploaded to the chain, any request for data use must be authorized by you. This ensures that individuals have data ownership, and everyone does not have to worry about data being stolen without knowing it. Not only can everyone build their own trusted digital identity, but it also greatly improves the efficiency of connection when collaborating with others.