Blockchain network security challenge

Publish: 2021-04-22 09:12:13

In 2017, blockchain technology is undoubtedly a new wave of technology after the mobile Internet. From the three dimensions of technology implementation, commercial application and commercial realization, blockchain is expected to become a new technology after the mobile Internet, which will once again subvert people's digital lifestyle. At present, the new technology wave of blockchain fascinates more and more developers. Therefore, Neo, a non-profit community blockchain project, joins hands with Microsoft to open the first domestic blockchain developer competition, aiming to proce more excellent applications based on Neo blockchain and Microsoft's development environment and tools, so as to form a strong application ecology for blockchain developers

"People are using blockchain technology in a more interesting way as the basis for 'decentralized applications' rather than just applications like financial technology and cryptocurrency," said Mike Mason, technical director of the office of chief technology officer of ThoughtWorks, a global software consulting firm. You know, "blue ocean" has never lacked players. Some Internet companies are trying their best to land on the beach, and have established the blockchain instry market as an inevitable choice for development. In China, netxin technology, a wholly-owned subsidiary of Xunlei, has used blockchain technology in the innovative cloud computing mode - "shared computing"

earlier, Xunlei implanted the concept of sharing economy into the field of cloud computing, and created an original" sharing computing "mode. By collecting users' idle computing resources, Xunlei transformed them into innovative cloud computing services for enterprises, On the one hand, it can effectively solve the social contradiction between the shortage of social computing resources and the high cost of computing, on the other hand, it can greatly rece the operating costs of enterprises. In August 2017, Xunlei launched a new sharing economy intelligent hardware player cloud. Its significance lies in that in the shared computing ecosystem, Xunlei joined the blockchain technology to issue player coins to users who share idle resources such as bandwidth, storage and computing power through the player cloud intelligent hardware

playcoin is a digital asset created based on blockchain technology in the thunderbolt shared computing ecosystem. With the launch of playcoin, Xunlei has become the pioneer of blockchain technology in China, and also has many advantages in its shared computing. Firstly, playcoin, based on shared computing and blockchain technology, ensures that the payment and income of users' shared computing resources and content are equal through smart contracts, which cannot be denied; Secondly, through decentralized accounting records, all transactions are true and transparent; Third, register users' right and modify records through blockchain to protect users' right from infringement

in fact, blockchain technology has strong advantages in network security, cross-border payment and other fields, and also has important value for building a community of destiny in cyberspace. On October 31, 2017, Chen Lei, CEO of Xunlei group and CEO of netxin technology, put forward the all in blockchain strategy and announced that Xunlei will increase investment in blockchain technology starting from the player cloud to explore the application of cloud computing and blockchain technology integration. On the day of the press conference, playmaker cloud also signed a right content distribution agreement with 4K garden, trying to integrate shared computing and blockchain technology to provide a platform for right distribution and content distribution. In the future, blockchain will generate more application scenarios in thunderbolt's shared computing ecosystem. Xunlei's innovative attempt may give more inspiration to developers of other blockchain technology applications

at the same time, as a leading enterprise in the blockchain application market, Xunlei is also actively guiding the healthy development of blockchain applications, insisting on not doing ICO, not going to the third-party trading platform, and severely cracking down on the third-party platform for illegal trading of customer coin, and cracking down on speculation and speculation through such measures as the real name system of customer Coin Wallet. Therefore, blockchain application developers should also abide by the law and avoid risks

based on the blockchain technology, Xunlei's "player cloud" takes the lead in building the C-end application of China's blockchain technology, which promotes China's blockchain technology to participate in the ecological development of global blockchain and creates important value in the development of digital economy“ The development history of the Internet is a history of innovation and Entrepreneurship of Internet talents. " The development of blockchain also needs a lot of talent support. We are looking forward to the birth of "blockchain +" Application in the first domestic blockchain developer competition

2. Because each block contains its own hash value and the hash value of the previous block, changing a hash value will invalidate the rest of the blockchain
if you have problems with blockchain, you are welcome to chat in private~~~~~

3. Come out early, you go to the official account of the fun chain technology, but only 5 winners, do you know if you are lucky?

relying on blockchain technology, zero knowledge proof, code is law
the system is planned at the beginning

@ block chain make complaints about

5. At present, the current situation of blockchain technology development in China is that there are more patents, less paper code, no independent security controllable underlying platform, and no integrated platform of software and hardware, which will directly lead to the technical risk of blockchain core technology being controlled by others, the financial risk of foreign open source platforms seizing the financial market, and the economic risk of foreign open source platforms penetrating China's real and virtual economy. Therefore, it is very important to realize the landing of blockchain application as soon as possible. Now there are landing applications all over the country under the support of policies. Changsha high tech Zone has officially launched a blockchain project, which is called SMIC blockchain service platform. It is a government enterprise service platform, cooperating with Bank of Changsha and Dean justice, and now it is the stage of collecting enterprises to join the chain.

6. The mines in Outland should be the most valuable, but it's hard to mine, and the mines in pandaliya are also good
under the ideal situation of big bird mount + no one grabs the mines with you + opposing camp doesn't kill you + familiar with the mines, more than 1000g per hour
under normal circumstances, e to various interference factors, 500g per hour is good, minus 200g per hour, the actual income is 300g per hour, If you are engaged in manual mining, you should also consider the fatigue factor. The more mining, the lower the efficiency. It is not recommended to use this lowest level method of earning money. Just like the wage earners in big cities, they can barely earn a living (point card money), but they have no future

Blockchain:

blockchain is a new application mode of distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm and other computer technologies. The so-called

consensus mechanism is a mathematical algorithm to establish trust and obtain rights and interests between different nodes in the blockchain system.

blockchain has the characteristics of decentralization, distrust, scalability, anonymity, security and reliability:

the concept of blockchain was first put forward in the paper of Nakamoto Tsung in 2008. Blockchain can be understood as a public accounting mechanism (technical solution), which is not a specific proct. Its basic idea is: through the establishment of a group of public accounts on the Internet, all users in the network jointly keep accounts and check accounts on the account book, to ensure the authenticity and non tampering of information. And the reason why it's called & 8218; Block No. 8219; Chain, as the name suggests, is because the structure of data stored in the blockchain is composed of one by one on the network; Storage block; Each block contains all the information exchange data in the network within a certain period of time. Over time, the chain will grow

characteristics of blockchain

blockchain has the characteristics of decentralization, distrust, scalability, anonymity, security and reliability:

Decentralization: because the blockchain relies on each node to achieve the maintenance of the system and ensure the authenticity of information transmission, it is based on distributed storage data without centralized management by a certain center, Therefore, the attack and tampering of a node will not affect the healthy operation of the whole network

de trusting: the establishment of a connection between any two nodes does not need to trust each other's identity, and the data exchange between the two sides does not need the basis of mutual trust. Because all nodes in the network can play the role of ﹥ 8218; The supervisor; So don't worry about fraud

Extensibility: blockchain is a kind of underlying open source technology, on which various kinds of expansion, decentralized and distrusted applications can be realized

anonymization: both sides of data exchange can be anonymous, and nodes in the network can exchange data without knowing each other's identity and personal information

safe and reliable: because the activities between any nodes are supervised by the whole network, and the database uses distributed storage, for hackers, first, they can't disguise and cheat, second, they can't control the network by attacking a node

supply chain management

refers to the process of optimizing the operation of the supply chain from purchasing to meeting the final customers with the least cost. MBA, EMBA and other management ecation include the enterprise supply chain management

supply chain management is to coordinate the internal and external resources of enterprises to meet the needs of consumers. When we regard the enterprises in each link of the supply chain as a virtual enterprise alliance, and any enterprise as a department of the virtual enterprise alliance, the internal management of the alliance is supply chain management. However, the composition of the alliance is dynamic and changes at any time according to the needs of the market

effective supply chain management can help to achieve four goals: shorten cash flow time; Rece the risk faced by enterprises; Achieve profit growth

long; Provide predictable revenue

seven principles of Supply Chain Management: dividing customer groups according to the service characteristics required by customers; According to the customer demand and the profit situation of the enterprise, the logistics network of the enterprise is designed; Listen to market demand information and design procts closer to customers; Time delay; Strategic determination of

source of goods and procurement and establishment of win-win cooperation strategy with suppliers; Establish information system in the whole supply chain; Establish the performance evaluation criteria of the whole supply chain

although most people ignore the existence of agriculture, it does provide basic needs for our society. For young people, exploring the agricultural world is not attractive, mainly because of the lack of technical content in agricultural operation process. In addition, agriculture is a relatively complex business field, which needs more transparency and more perfect instry standards

and blockchain technology can change the status quo. Consumers all over the world prefer "clean" food, but procers have no way to verify the reliability of procts. Replacing the current supply chain management system with distributed accounting books can bring higher transparency and encourage consumers to buy food and procts after careful consideration

from a technical point of view, the use of blockchain in agriculture can realize intelligent supply chain management. But the whole agricultural management process needs a technical inspection. At present, agricultural technology solutions are either implemented by specific software or by service providers, but these two solutions are expensive and sometimes can not achieve the desired effect

recently, Emma, CEO of agridigital ( agriculture based on blockchain and smart contract supply chain management platform ); Emma Weston explained in detail how blockchain technology can solve the defects in the field of agriculture. The immutability of transactions and information in distributed account books is the key to solve all problems. Recording proct information on the blockchain is the most correct choice, and farmers, retailers and consumers can benefit from it

consumers are increasingly concerned about whether food is "clean" and organic, but procers and processors are usually unable to track and verify a series of accurate data related to procts from farm to table. Blockchain can help a lot. At present, there is no simple, accurate and effective way to track slave workers, raw material pollution and the origin of goods. At the same time, consumers are more willing to pay for the organic food with the above details. So far, we know that the root of the problem lies in certification and regulation, which are expensive, difficult to implement and confusing to consumers

the biggest problems faced by the agricultural sector are random pricing and high transaction fees. Once the supplier can not give a reasonable price, consumers are not willing to accept the final result. The cost of supply chain management greatly reces the interests of farmers, but also adds a lot of confusion to agricultural development

the development trend of block chain technology in the future agricultural field is still a mystery. However, there are many specific use cases, including land registration, big data monitoring, and even the application of smart contract. In the next ten years, there will be numerous use cases of blockchain in the field of agriculture, and the development prospect is very good

8. Before, I listened to a song "true hero", which benefited me a lot. There is a passage of lyrics, grasp every minute of life, go all out to our hearts dream, without wind and rain, how to see the rainbow, no one will casually succeed. This sentence made me understand that no matter what I want to do, I should cherish every minute and every second of my life and do what we want to do most in our hearts; And in the career, learning will encounter some difficulties, don't lose heart, because no matter who can't succeed without difficulties. There is a saying that I think is well said, don't do what we like, but like what we do. Don't we have true heroes around us? The cleaners in the building area are not too smelly or dirty. They sacrifice themselves to provide a beautiful living environment for everyone; The traffic police uncle who stands in the middle of the road and commands the vehicles every day dare not relax for the safety of the people; The uncles who worked in the construction site every day, they exchanged their sweat for the tall buildings, built our beautiful teaching building, and built our quiet and warm home for us. There are many "true heroes" around us, but we have never found them. Someone once said, "the world is not lack of beauty, but lack of people to find it." In the world, not only the people like Dong Cunrui who bombed the blockhouse are heroes, not only the people like Huang Jiguang who blocked the muzzle with his chest are heroes, but also the martyrs are heroes, because as long as they serve our human society, they are heroes. I think so. In today's society, there are a lot of "true heroes". However, for those who wish to be true heroes, I hope that when I grow up, I will be a "true hero" who dedicates to the people and has no regrets! All in all, all in all. As long as I go all out to do what we want to do, and succeed, then we can become a respected "true hero"“ Seize every minute of life, go all out to dream in our hearts, how can we see a rainbow without going through the wind and rain, no one can casually succeed... "This is the famous singer Zhou Huajian's" true hero ". When I hear this song, I will be enthusiastic and feel boundless emotion in my heart, and I will sing along with that song, because this song praises the people, There are countless "true heroes" among the masses. In life, there are true heroes; In learning, there are true heroes; In career, there are also true heroes... In life, tenacious people are true heroes. Once there was a disabled child who was lame. Would he give up his life? He won't, he will never! If he wants to live on, he has to rely on his own efforts to succeed. Finally, with his own efforts, he overcame many difficulties in his life and study. He was finally admitted to the University, and achieved excellent results in his study. He was able to get a scholarship every year, which reced the burden on his family. When he was worried about looking for a job, the school saw that there was such a good talent, and he was also a disabled person. Everyone was deeply moved by his spirit of being disabled, loving life, and living tenaciously. So they left the disabled person, and he had a stage to show himself, and he could also bear the life of his family. Is he a true hero? He is. He works hard and creates. He lives tenaciously and creates miracles again and again. He is a strong man in life. Under the threat of illness, he not only never flinches, but also works harder. Finally, he conquers the illness and the cruel fate, and becomes a true hero who challenges the fate like Hawking. He deserves to be a true hero. In learning, the striver is a true hero. In the program "moving China", I saw a big brother who was still struggling under the condition of very poor family and finally went to university. He didn't just care about himself. While he was studying hard in school, he worked hard to make money. He wanted to help his sister study. He continued to struggle, He didn't want to bow down in front of others. He took his sister to school and depended on him. He took care of his sister himself and let the family worry less. In the University, his performance is also very good, deeply appreciated by teachers and classmates. But he is not satisfied with his present achievements. He has a higher and more ambitious ideal - he wants to study as a postgraate and doctor in the best school in China. This big brother is not only a strong man in life, but also an outstanding one in study. Is he a true hero? Yes, he is. He struggles, he wants to make his family life better, he wants to let his sister read a book and go to university like him, he struggles in his study to make his family live a happy life, his quality and persistence in knowledge are not precious wealth? Isn't he worth learning from? Shouldn't he be a true hero? Let's sing this song "true hero" again, the true hero in the song! Whenever this old song starts, I feel a lot of emotion“ In my heart, I once had a dream to forget all the pain with singing: everyone has his own sweet dream. When we have pain, we can use moving singing to appease our emotions“ The brilliant starry sky, who is the real hero, ordinary people give me the most moved ": grasp every minute of life, go all out to our hearts of dreams, do not experience wind and rain, how to see the rainbow, no one can casually succeed..." a sweet song in my ear for a long time! This song is true hero. Whenever this old song starts, I feel a lot of emotion“ In my heart, I once had a dream to forget all the pain with singing: everyone has his own sweet dream. When we have pain, we can use moving singing to appease our emotions“ Brilliant starry sky, who is the real hero, ordinary people give me the most moved ": in the starry sky bright night, I do not know who is a hero, a winner, although ordinary, simple, but gave me favor, let me move“ No more hatred and no more pain, I hope there is love everywhere in the world: May there be no hatred and no sorrow in the world, and the shadow of love and the trace of care can be seen everywhere in the vast territory“ Wish you a different life from now on“ Grasp every minute of life: every inch of time is precious. Although life is short, time is precious. We should make good use of precious time in our short life“ Go all out for the dream in our heart: since there is a sweet dream, we should try our best to realize it“ No one can casually succeed in seeing a rainbow without experiencing wind and rain ": only after experiencing countless storms, lightning and thunder can we see a colorful rainbow. If you want to succeed, if you want to win, you must experience setbacks and overcome many difficulties. No one can succeed casually and coincidentally“ When you are moved, you should hold it well and hug your beloved friends“ Let sincere words and happy tears flow in the bottom of my heart: as a friend, we should share happiness and difficulties. If you have sincere words, you should tell them to your friends. If you have happy tears, you should flow in your heart with your friends... "If you don't experience wind and rain, how can you see a rainbow? No one can casually succeed!" Yes, only those who are self-reliance, determined to become talents, have sweet dreams and great, noble thoughts and sentiments, are worthy of experiencing the wind and rain, to see the bright and dazzling rainbow, to be a strong person in life, to be a "man of virtue", to live a happy and happy life... Students, in fact, success is not far away, it is far away and near! As long as there are "three hearts", you will certainly be able to go to the smooth road of success! What are the "three hearts"? They are: enough patience, unswerving determination (also can be said to be perseverance) and undaunted confidence. The melodies of leisurely floating over the noisy city are like a clear spring, moistening every one who has heard enough; Sentimental & quot; My heart. So, in that sty corner for a long time, there is a familiar feeling. At the same time, also remember the name of the song, true hero. There are kitsch elements in the songs of Hong Kong and Taiwan - resentful and crazy. In short, there are not many that can be recognized by the people in mainland China. However, this song is like a pure lotus, which grows out of mud and does not dye. It is graceful and graceful. It emits its fragrance, which makes many people stop. It did not deliberately go to packaging, there is no great momentum to do publicity, why! Let's look at the topic first. The good title is the eyes of the song& quot; True heroes & quot; These four words are very attractive in themselves. What kind of people are heroes! Does the author want to show us the combination of gun, sword and fist through the deafening jazz; Hero & quot; Is that right? That & quot; Sincerity & quot; What is the explanation of the word? Turn on the radio with doubts and curiosity, and you will hear a gentle rhythm. Until the end of a song, I found out how old my way of thinking is! With his understanding of life, the author reinterprets the definition of hero - true hero: he says that we should first have broad love, the disseminator of truth, goodness and beauty; Secondly, he should have the courage to fight and be a strong man in life. Perhaps, you think, he has a strong sense of preaching, then, please continue to taste, you will certainly feel ridiculous for their own ideas& quot; In my heart, there was a dream to let you forget all the pain with singing& quot; The friendly and beautiful opening remarks bring people into a dreamy atmosphere, but the language is not flashy at all. To sit face to face with you, tasting a cup of tea, heart and you frank conversation. Tell you the hope you once had and the innocence you always showed. Perhaps, & quot; No hate, no pain, I hope there is love everywhere& quot; It's a little far away, but you never think it's naive. Because this is a kind of most sincere emotion, we may have had, in the innocent childhood. Just one day, you overhear and witness a kind of ugly behavior, so the crystal like wish is broken. When you hear someone talk to you again, the heartstring will be stirred to arouse your desire for sincerity and kindness. Isn't friendship what we expect? And Jackie Chan sang that sentence, & quot; Who is the real hero in the starry sky? Ordinary people have moved me the most;. Seemingly simple, it contains a profound truth. In fact, we are all ordinary people. Whether we are superstars or street vendors, we all have enviable shining points, but also a dark side. Who can be called the world's favorite, and who can say that looking back on the road, we find that the most ordinary is the most true. When we are still intoxicated in the first part of the true feelings and dreams, the four men have sent us a wave

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Blockchain network security challenge

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