Why is the blockchain tamper-proof?

Blockchain is a distributed ledger database, and its core is the essence of trust, that is, the ledger is still in use and there are records in the ledger that cannot be tampered with. In order to prevent tampering, its design is different from the traditional ledger in two aspects:

A signature will be added to each record.

Every device in the blockchain network has a complete and identical account book.

Another feature of the blockchain is that each computer keeps an account book, and each book is exactly the same. This can ensure that one account book is destroyed (the disk is damaged or tampered with, making it unusable), and the account books on other machines can still be used, ensuring that data will not be lost.

The above two points are the core technologies that the blockchain can establish a trust relationship, ensuring the reliability and tamper-resistance of data. This completely changed the trust transfer between two strangers without the participation of an intermediary. With this foundation, the whole "new institutional economics" will no longer exist, and even the trust companies derived from it will be replaced. This is probably why Alipay announced the introduction of blockchain technology in June 20 17. It is boldly predicted that future Internet companies will be built on blockchain, which can be imagined as property rights chain, food safety chain, financial service chain, blockchain chain and so on.

The application fields of blockchain include digital currency, securities trading, finance, security traceability, privacy protection, supply chain, entertainment and so on. The popularity of blockchain and bitcoin has made many related top-level domain names registered, which has had a great impact on the domain name industry.