Blockchain risk control
Although driven by the influx of capital and talents, the blockchain instry ushered in rapid development, but as an emerging instry, the frequent warning of its security vulnerabilities caused people to worry about the risk of blockchain
Yu Kequn, director of the national information technology security research center, pointed out that the emergence of blockchain has brought people a lot of expectations for privacy exposure, data leakage, information tampering, network fraud and other issues. However, there are still many challenges in the security of blockchain 
Li Bin, assistant director of China Information Security Evaluation Center, analyzed that the current blockchain is divided into three types: public chain, private chain and alliance chain. No matter which type, it faces security challenges in algorithm, protocol, use, time limit and system. What is particularly critical is that the current blockchain is still facing 51% attack problem, that is, nodes can successfully tamper and forge blockchain data by mastering more than 51% of the network examples
it is worth noting that in addition to external malicious attack risk, blockchain also faces the threat of its endogenous risk. Yu Kequn reminded that how to build a complete security application system around the equipment, data, application, encryption, authentication and authority of the application system of the whole blockchain is an important problem that all parties must face
Wu Jia also analyzed that as an emerging instry, employees in the blockchain instry are lack of safety awareness, which leads to the low safety factor of the software and hardware related to the blockchain and a large number of security loopholes. In addition, there are many ecological links in the whole blockchain. In contrast, the strength of the relevant security employees is scattered and it is difficult to form a joint force to solve the problem. A systematic solution is needed to meet the above challenges
content source: zhongxin.com
Yu Kequn, director of the national information technology security research center, pointed out that for privacy exposure, data leakage, information tampering, network fraud and other issues, the emergence of blockchain has brought a lot of expectations to people. However, there are still many challenges in the security of blockchain
Yu Kequn said that at present, the blockchain is still in the primary stage, and there are many challenges such as the security of cryptographic algorithm, protocol security, use security, system security and so on
Yan Hanbing, director of the operation Department of the national Internet Emergency Center, also pointed out that if blockchain wants to occupy an important position in the global economy, it must first solve the security problems it faces
Yan Hanbing pointed out that blockchain security issues include many aspects. For example, traditional security issues, including the protection of private key, including the traditional vulnerabilities of application layer software. In addition, there are some loopholes in the new protocol
the data provided by the decentralized vulnerability platform (DVP) also shows the seriousness of blockchain security issues. Wu Jia, head of DVP, revealed that in the week since July 24, DVP has received 312 vulnerabilities from white hat, involving 175 project parties. Including smart contracts, well-known public chains, exchanges and a series of other projects. There are 122 high-risk vulnerabilities, accounting for 39.1% of all vulnerabilities, and 53 medium risk vulnerabilities, accounting for 17% of all vulnerabilities
Li Bin, assistant director of China Information Security Evaluation Center, analyzed that the current blockchain is divided into three types: public chain, private chain and alliance chain. No matter which type, it faces security challenges in algorithm, protocol, usage, time limit and system. What is particularly critical is that the current blockchain is still facing 51% attack problem, that is, nodes can successfully tamper and forge blockchain data by mastering more than 51% of the network examples
it is worth noting that in addition to external malicious attack risk, blockchain also faces the threat of its endogenous risk. Yu Kequn reminded that how to build a complete security application system around the equipment, data, application, encryption, authentication and authority of the application system of the whole blockchain is an important problem that all parties must face
Wu Jia also analyzed that as an emerging instry, employees in the blockchain instry are lack of safety awareness, which leads to the low safety factor of software and hardware related to the blockchain, and there are a lot of security loopholes. In addition, there are many ecological links in the whole blockchain. In contrast, the strength of relevant security employees is scattered, and it is difficult to form a joint force to solve the problem. A systematic solution is needed to meet the above challenges.
The risk of any investment is directly proportional to the return. The key is whether you dare to participate in it. Of course, there are too many uncertainties in the current blockchain instry, not because of the instability of technology, but more because some insatiable people are black hearted and hard to defend
in my opinion, bitcoin is the most popular blockchain derivative currency at present, and there is no one. Then there are many other counterfeit currencies. If you hold some bitcoin now, but you are short of bitcoin, it is equivalent to a risk. And you are facing this risk. In the normal way, you can hardly short bitcoin to make profits, unless you do some up and down options to hedge the risk. I have done some short-term options in extreme NEW Europe, Long term options are not recommended, and few platforms can. Bitcoin doesn't operate in the same way as foreign exchange, so it has profit opportunities. When you are bullish, you can buy or hold money. When you are bearish, you can throw money. When you hold money, you can only hedge it by buying options, so the risk is relatively high
according to the current bitcoin market, if this position is at the bottom again at most, it will hit the top edge of the box. In short, this range fluctuation will increase. If there is a wait-and-see, you can wait until you fall to the bottom of the box and try to buy it. You must set a stop loss, or you will be confused when you are buried. If you think bitcoin is too expensive, you'd better find some options to get addicted to it
Game companies, whose main source of revenue is online currency sales, have made a fortune of hundreds of millions of yuan every quarter. This is done in China, where only 2% of people are online and 0.4% of people play online games. In South Korea, 80% of people surf the Internet and 60% play online games. The market prospect is immeasurable. Among them, the most popular are online game virtual equipment trading, as well as digital music, video wallpaper, e-book download market. Virtual goods trading is known as "the second market of online games", that is, online acquisition and sale of players' virtual currency and equipment in the game. In short, its business model is to use cash to buy virtual goods at a low price, and then sell them at a high price to achieve profit margin. Data shows that 460000 online game users often trade virtual goods. There are 30 million online game fans in China, and the secondary market has a capacity of at least 1.95-3 million people. If the per capita game consumption is estimated to be 300 yuan, the market capacity will be at least 600 million to 900 million yuan
in the United States, some people tried to sit in front of a computer every day and buy low-cost virtual property, looking for opportunities to sell it at a high price. It is estimated that the annual income of doing so will exceed the average income of middle school teachers, Musketeers and firefighters in the United States. IgE, the largest online game virtual goods dealer in the United States, has a monthly sales volume of US $10 million to US $20 million and a gross profit margin of 20% - 50%. There were dozens of virtual mints in Wenzhou, Zhejiang Province. They hired people to play games to earn game coins and sold them at about 20 cents each. There are also many indivials who earn income from the proction and sale of virtual currency, and their profits are more than 50%
in the online games participated by millions of people, the daily proction and exchange also condense the undifferentiated human labor. The way for players to earn money is to get gold coins and equipment by defeating monsters. It only depends on how long you are willing to do it. The second market is to let those players who are willing to spend more time in the game get income through redistribution. The virtual currency bought with cash can make players enjoy the pleasure of real-life billionaires in the game, which makes the transaction of virtual goods become a kind of social economy. It is difficult to estimate how many people in China are employed in this way
in the network, popularity brings wealth, and the value of various online currencies is different. Companies that issue online currency must have a large user base and attractive applications to promote the promotion of this kind of online currency in the whole Internet. The better the currency is, the higher the value is. Tencent is a representative case in this respect. In some groups, q-coin has even reached the level of obsession, and the company has made countless profits. For example, after playing some games that need to bet, players can easily buy Q coins through their mobile phones and then change them into game coins. When a player wins 10000 game coins, the game operator will dect 1000 in the name of the tap; Young women prefer QQ shows, and the virtual fashion on QQ is not much cheaper than the real-life money to buy clothes. Tencent's Internet value-added service revenue in the first half of 2006 was nearly 900 million yuan