In a system, each participant is independent and equal, and these participants do not rely on a central authority that guarantees currency or verifies settlement transactions.
This system is blockchain, which uses a P2P network to distribute and store data, thus achieving a decentralized, irreversible, and tamper-proof special storage system.
Many companies are now using blockchain technology because its characteristics largely ensure a smoother and more stable business development path. Let's discuss some of the characteristics of blockchain.
The first, of course, is the characteristic of distributed storage technology. Compared to traditional relational databases, blockchain technology has the characteristics of a distributed database, such as:
Consistency: The integrity of the database will not be compromised.
Isolation: Multiple things are completely isolated; the execution of one thing will not be affected by other things.
Durability: Once a transaction is completed, the changes made to the database by that transaction are permanently stored in the database.
Atomicity: All operations either execute completely or reject completely; there is no intermediate state.
The second characteristic is, of course, the cryptographic feature. This feature is to ensure that data is irreversible, immutable, and untraceable, so blockchain employs some cryptographic techniques.
The third is the consensus mechanism. As we all know, a core technology in blockchain is decentralization, which ensures that every node is equal. This requires an algorithm and mechanism to guarantee it.
The fourth characteristic, which is now favored by many companies, is smart contracts. Transactions are traceable and tamper-proof. A smart contract is a pre-edited "digital language record of terms." This has been applied in many industries, such as banking, the Internet of Things, and exchanges.
Understanding blockchain technology is complex, and it can be difficult to fully grasp its working principles, functions, or usage. Below, we'll use simple terminology to explain the advantages and disadvantages of blockchain technology, giving you a clear understanding of its characteristics. Beijing Muqi Mobile Technology Co., Ltd., a professional blockchain outsourcing development company, welcomes communication and cooperation. We hope the knowledge presented below will be helpful to readers who want to learn about blockchain. Please feel free to discuss any questions you may have.
1. Distributed, decentralized
Because of the use of distributed computing and storage, there is no centralized hardware or management institution. The rights and obligations of any node are equal, and the data blocks in the system are jointly maintained by the nodes with maintenance functions throughout the system.
2. Unalterable and irrevocable
Because of the distributed and decentralized nature of blockchain, individual tampering cannot be recognized by the entire network, making the data tamper-proof.
3. Openness
The system is open. Except for the private information of the parties involved in the transaction, which is encrypted, the blockchain data is public to everyone. Anyone can query the blockchain data and develop related applications through the public interface. Therefore, the entire system is highly transparent.
4. Autonomy
Blockchain uses consensus-based standards and protocols (such as a set of open and transparent algorithms) to enable all nodes in the system to freely and securely exchange data in a trustless environment, changing trust from "people" to trust in machines, and rendering any human intervention ineffective.
5. Anonymity
Because the exchange between nodes follows a fixed algorithm, their data interaction is trustless (the program rules in the blockchain will determine whether the activity is valid on their own). Therefore, trading partners do not need to disclose their identities to gain each other's trust, which is very helpful for accumulating credit.
shortcoming:
Compared to traditional databases, current blockchains cannot store large amounts of data.
(1) Irrevocable
In blockchain, if you make a mistake or lose your password, the loss will be irreversible.
(2) Privacy
Because blockchain is distributed, the transaction ledger must be public and transparent, with no privacy whatsoever.
(3) Storage space
Because it requires access to all historical records, performance is affected when the number of transactions is large.
(4) Delay
Due to the nature of distributed systems, authentication is required from all participants, which leads to transaction delays.
(5) Performance issues that arise when the data volume is large
Each transaction requires tracing back every historical transaction to calculate the balance in order to verify that you actually have enough money.
(6) Energy consumption problem
The generation of blocks requires miners to perform countless meaningless calculations, which is extremely energy-intensive.
Blockchain technology, as a decentralized, secure, and reliable technology, has attracted much attention in recent years. It has been widely applied in fields such as finance, supply chain management, digital identity authentication, and smart contracts. This article will focus on discussing the advantages and disadvantages of blockchain technology.
1. Decentralization: The core advantage of blockchain technology is decentralization. Traditional centralized systems suffer from single points of failure and unreliability. The decentralized nature of blockchain technology means that the storage and management of data such as transaction records, digital identities, and smart contracts do not rely on a central institution and can be shared and verified throughout the network. This also means that blockchain technology can prevent data from being controlled by any single institution or individual, improving the system's security and reliability.
2. Security: Due to the decentralized nature of blockchain technology, each blockchain node verifies transactions and records them in a distributed ledger. These transaction records are encrypted using cryptographic algorithms, making them immutable and thus ensuring transaction security. Moreover, since each node possesses a complete ledger, any malicious attacker who wants to tamper with information in one ledger would need to simultaneously tamper with all ledgers in the entire network, making such an attack extremely costly.
3. Transparency: Due to the openness of blockchain technology, anyone can view the transaction records in the distributed ledger. This increases data transparency and reduces fraud. For example, in supply chain management, all participants can view transaction records, allowing for monitoring and auditing of every link in the supply chain, thus reducing potential fraud and violations.
4. Trustlessness: A key advantage of blockchain technology is trustlessness. In the traditional financial system, transactions must be mediated through banks or other financial institutions. This means users must trust these intermediaries because they control the transactions. In blockchain technology, however, transactions are verified and recorded by nodes in the network, requiring no intervention from any intermediaries, thus reducing the need for trust in third-party institutions.
Disadvantages of blockchain
1. Energy consumption issues of blockchain
The generation of blocks requires "mining," which involves miners performing extremely large mathematical calculations that consume enormous amounts of electricity. According to a study published by the Cambridge Centre for Alternative Finance (CCAF), electricity consumption related to Bitcoin reached an all-time high in 2020. Global mining used over 7 gigawatts (7 GW) of electricity (approximately 63.32 terawatt-hours), roughly equivalent to the power of seven nuclear power plants or 21.8 million solar panels.
2. Blockchain efficiency issues
Transactions on the blockchain are subject to latency. Taking Bitcoin as an example, the validity of a transaction is affected by network transmission. For a transaction to be known by a majority of nodes on the network, it must wait until the next accounting cycle (Bitcoin typically takes about 10 minutes), meaning the transaction needs to be approved by a majority of nodes. It is also affected by a low-probability event: if two or more nodes simultaneously compete for the right to record transactions, two or more blockchain branches will be created. Which branch's data is valid will be determined in the next accounting cycle, ultimately by the longest blockchain branch. Therefore, blockchain transaction data is subject to latency.
3. Policy game issues surrounding blockchain
The decentralized and autonomous nature of blockchain technology diminishes the concept of national regulation. In situations where regulation is ineffective, the profit-driven nature of some markets can lead to the application of blockchain technology in illegal areas, providing a haven for the black market. To strengthen regulation, governments will then introduce corresponding policies to restrict and regulate such activities.
