I don't know if you have this feeling, listened to many experts' speeches, and read many articles related to the blockchain. When someone asks you about the advantages of the blockchain, will these three words appear in your mind: "Transparency, contract, not tampering?" Are these three advantages of the blockchain really perfect?
At present, most of the understanding of the blockchain is based on the analysis of Bitcoin. In Bitcoin's logic, all nodes have a complete ledger, so everyone can check the balances and transaction information of other people's wallets to ensure that the other party does have so much to pay.
This is a way to build consensus, just like playing cards on the desktop, so everyone can see if they have money. After reaching a consensus, everyone can participate in the game on the same table.
This theory is more scientific in the financial field, but it is not so suitable in other fields. For example, using a drip taxi, in the early operation process, the driver and the passenger can see each other's mobile phone number, and then the driver harassed the passenger. In addition to sensitive information such as medical information, internal fund operations, and confidential information, not all data is publicly available.
And according to some countries' privacy and data protection laws, not everyone can be allowed to see all the data in the blockchain, so "transparency" is not always reflected in the blockchain, even in some areas. Information with higher transparency is not legal.
The contract has no legal effectAfter the Ethereum went online, there will be new ways of playing in the blockchain field, not only due to financial payments, but also other information. Ethereum's "automatic execution" smart contract concept hopes to eliminate the intermediary link. In the blockchain community, everyone also has a "code is law" consensus.
The application scenario of the smart contract is mainly: "A smart contract written by code, so that a service is not delivered as promised, then the customer can automatically receive the refund." Just like the online purchase did not receive the goods within the specified time, the system You can automatically refund.
The problem is that these code rules do not have legal effects in the real world. Smart contracts are just business rules written in software. These rules are only the programmers who write the code, or the enterprise itself.
Smart contracts are not legally binding if there is no separate contractual agreement. If there is a contract dispute, you still have to go to the court to go to court. According to the current legal system, it can be used as a material for the evidence, or a real contract is required.
Not tampering is not so goodOn May 20 this year, a blockchain application fired, that is, girls can pass the information of “Slag Man†to the blockchain. Because of the use of blockchain technology, this information is theoretically not tamperable. This technology is a great boon for information uploaders.
Previously, there were also people in the industry who wanted to put the news on the chain so that the information on the chain could not be tampered with. However, in the eyes of Cool Brother, this demand is not so good. To give a simple example, if the WeChat public article is wrong, if you can't change the wrong word, you can't delete it. Is it inappropriate?
And blockchain data can be changed, but the cost is very high, many people do not, just for economic reasons, do not want to do so. However, it should be noted that it is possible to tamper with the blockchain as long as the attacker's computing power exceeds 51%.
In the near future, many blockchain projects have encountered 51% of the power attack. Since someone has done this, he naturally has no loss.
On the morning of June 3, ZEN suffered 51% of attacks. According to official sources, the attack involved 19,600 ZENs worth about $550,000.
On the morning of June 5th, ZEN officially said that 3,317 ZENs were double-flowered.
Litecoin founder Li Qiwei said in Twitter that Bytecoin (BCN) was only $557 for a double-flower attack. The attacker used the ASIC mining machine that rented the loan to attack, which is easy to move forward and backward.
Note: Bytecoin BCN is a technology based on CryptoNote. It is committed to the advanced currency of the anonymous anti-machine gun pool. At present, the global market value is 1.2 billion US dollars. In May this year, it also suffered a double-flower attack.
From this point of view, “transparency, contract, and non-tampering†are not “blockchain mythsâ€. Enterprises must understand the actual situation of their own business and figure out what blockchain technology can do and what not to do.
If your needs really don't need to be tampered with, or if your trading process is too complex and costly, then you can deploy a blockchain solution. But before implementation, you must consider all the possibilities and limitations of blockchain technology, and do not make blockchains for blockchains.
Blindly following the trend of not understanding the combination of your own business and the blockchain can easily lead to project failure. In addition, the current application cost of blockchain technology is high, and it is easy to cause huge economic losses to enterprises.
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