The four most famous international exchanges:

Binance INTL	OKX INTL	Gate.io INTL	Huobi INTL
China Line　APP DL	China Line　APP DL	China Line　APP DL	China Line　APP DL

Note: The above exchange logo is the official website registration link, and the text is the APP download link.

Is the Bitcoin trading website development technology blockchain system safe? Blockchain is a new application model of computer technology such as distributed data storage, point-to-point transmission, consensus mechanism, and encryption algorithm. Blockchain technology has basic attributes such as decentralization, non-repudiation, non-tampering, security and irreversibility, and is gradually being applied in many industries such as artificial intelligence, finance, insurance, development, logistics supply, and the Internet of Things.

It will be launched from three aspects: "Towards Digital Assets", "Blockchain Technology and Development", and "Blockchain and Trusted Collaboration". "Blockchain is a complete, distributed, non-tamperable ledger database technology solution maintained by a multi-party consensus mechanism." Blockchain technology can be applied in document storage, anti-counterfeiting and traceability, intellectual property protection, and judicial voting. , cross-border and cross-department collaboration, credible lottery, public welfare donation announcement, blacklist management and many other scenarios related to people's daily life. At the same time, he also reminded specifically based on the current development characteristics of the blockchain field: blockchain technology is still imperfect in terms of performance and security, lacks large-scale application cases, and encryption economic theory needs further research and demonstration.

So far, blockchain is the most widely used in finance. In addition, although the impact on the financial field is more obvious, significant progress can also be made in other fields. For example, recruitment and human resources departments have developed Blockchain resumes can simplify the process by verifying the candidate's qualifications and relevant experience. At the same time, blockchain can also play an indispensable role in the manufacturing and industrial fields, and can use blockchain to track supply chains. Transaction work.

**Blockchain Core Technical Characteristics**

Blockchain originated from Bitcoin. From the literal meaning in English, it is the chain of transaction data blocks (Block). The industry defines blockchain as a public database (or public ledger) based on blockchain technology. In fact, blockchain is to establish a trust mechanism between individuals who have no basis for trust in each other, also known as a consensus mechanism. In order to establish the consensus mechanism of the blockchain, the blockchain must have the following core technical characteristics.

1. Distributed database

All transaction data of the blockchain are stored in each user's client node, and all these nodes form a distributed database system. The data destruction of any node will not affect the normal operation of the entire database. And it is applied in distributed architecture to establish a trust mechanism on the blockchain.

2. Timestamp and immutable

The timestamp on the blockchain refers to the total number of seconds from 00:00:00 GMT on January 1, 1970 to the present. It is usually a long character sequence that identifies a certain moment in time. Timestamp technology itself is not complicated, but its application in blockchain technology is a major innovation. Timestamps add time latitude to the future blockchain-based Internet and big data, making data traceable. At the same time, timestamps are proof of existence and can provide a solid foundation for the prospects of Internet commercial applications based on blockchain technology.

3. Encryption algorithm

Blockchain also applies an asymmetric encryption algorithm (elliptic curve encryption algorithm) that encrypts transactions. Asymmetric encryption algorithm refers to the existence of a pair of mathematically related keys. Data information encrypted using one of the keys can only be decrypted using the other key.

4.Digital signature

Add another piece of content after the information transmitted on the blockchain as proof of the sender and prove that the information has not been tampered with. Generally, the sender processes the information using a hash algorithm to obtain a hash value, then encrypts the hash value with the private key to obtain a signature, and then sends the information and signature to the recipient. The recipient uses the public key in the message to decrypt the signature and restore the hash value, and then uses the hash algorithm to verify the authenticity of the message and identify whether the message has been tampered with.

**Is blockchain technology safe?**

As a decentralized distributed database ledger technology, blockchain has the characteristics of point-to-point transmission, data storage, encryption algorithm and consensus mechanism, but is it really safe?

Blockchain is a decentralized recording technology. The nodes participating in the system may not belong to the same organization and do not need to trust each other; the blockchain data is jointly maintained by all nodes, and each node participating in the maintenance can obtain a copy of the complete record. From this, it can be seen that the block Characteristics of chain technology:

1. To maintain a growing chain, it is only possible to add records, and the records that have occurred cannot be tampered with;

2. Decentralization, or multi-centering, can reach consensus without centralized control, and the implementation should be as distributed as possible;

3. Use cryptography mechanisms to ensure that transactions cannot be repudiated and destroyed, and try to protect the privacy of user information and records.

Although understood purely from the perspective of blockchain, it is just a data recording technology or a decentralized distributed database storage technology, but if combined with smart contracts and expanded, it can provide more complex operations. Now Various active digital currencies are one of its manifestations.