Blockchain DDoS attack

1. Both indivials and enterprises can purchase alicloud servers and develop an app. However, real name authentication is required. Personal real name certification and enterprise real name certification, after passing the certification, you can easily choose cloud computing procts. Leave a message or see the content of the blog, Lao Wei has written many detailed articles, which can help you get started.

2.

Osmanthus fragrans doesn't belong to Osmanthus fragrans. Cigui, also known as Huaye tree, mouse thorn; It is a plant of Ilex family. Evergreen shrubs or small trees, landscaping tree species. It is mainly distributed in the middle and lower reaches of the Yangtze River in China

There are four groups of Osmanthus fragrans, namely Dangui, Jingui, Yingui and sijigui. Among them, Osmanthus fragrans, Osmanthus fragrans and Osmanthus fragrans all bloom in autumn and are collectively called August osmanthus. Generally, it takes at least 10 years for Osmanthus fragrans seedlings to bloom in open field. For newly transplanted seedlings, it is not allowed to apply fertilizer too early. Sowing seedlings, after two years of cultivation, the next spring can be transplanted, flowering period in ten years

3. In a simple explanation, 51% attack is also called majority attack. It means that malicious miners control more than 50% of the hash rate of the blockchain network, and then attack the network and take over the blockchain network, so that criminals can reverse transactions, stop payment or prevent new transactions from being confirmed
for more information about 51% attacks, you can learn about them on the password finance network,

4. I think that DDoS has no solution at present, and there is no best choice. I can only defend passively, but try to minimize the impact and loss when attacked. Blockchain technology is similar to CDN, which is the principle of load balancing, but the specific working mode is different. This technology is generally used more in the financial instry

5. How to protect my bitcoin after bifurcation
if bitcoin really forks, as an ordinary user, the biggest risk is replay attack
what is replay attack? If bitcoin is split into one or more bitcoins, such as btc1 / btc2 / btc3, each bitcoin account will have a corresponding number of all bifurcated coins according to its bitcoin balance
because the address, private key, algorithm, etc. on each chain are the same, and the transaction format is also the same, the transaction initiated on one blockchain can be broadcast on another blockchain and may be confirmed. This is the "replay attack."
in short, when you transfer btc1, your btc2 / btc3 may also be transferred at the same time
however, at present, many forked coins have done two-way anti replay attack processing to avoid the risk of replay attack after forking.

6. This requires access to professional advanced defense companies for protection. 1. It depends on whether it is DDoS traffic attack or CC attack. Traffic attack prevention is relatively rough and simple. Most companies compete with bandwidth resources for this kind of local protection. But in the event of CC attacks, few can be prevented and the protection effect is good. 2. Ruisu cloud professional network security company reserves 4T + high defense bandwidth resources. CC protection is based on the unique signature analysis technology, customized protection according to the characteristics of the attacked, and cloud protection. It is not limited to the source server area. It can quickly access our ruin protection system within 10 minutes, and can do the protection of various application systems, such as four layers and seven layers, to help a lot of chess and card Virtual currency exchange, payment, e-commerce and other well-known customers successfully resist hacker attacks. 3. Free access protection running in, protection effect is satisfied, and then the formal cooperation.

7. Heteromorphic attack, also known as address pool pollution, refers to the intrusion and pollution of nodes between similar blockchain systems. This is an attack that most public chains are likely to face. The opportunity of this attack is that many public chains have handshake protocols with similar chains, and then the system can not identify whether the node belongs to its own chain. The attacker can use this point to collect the address of the public chain and make a malicious handshake, contaminate the address pool through the node handshake, so that the nodes of different chains shake hands with each other and push the known nodes in their respective address pools to each other, causing more nodes to contaminate each other and eventually spread to the whole network. The communication performance of the node under heteromorphic attack will decline, and the node will be blocked, which will eventually lead to the abnormality of the main network. The security of blockchain system is not only provided by technology itself, but also provided by developers. The more careful the program logic designed by developers, the lower the possibility of being broken. Therefore, if you need to develop a system, you must find a reliable development company. Xuanling technology is a reliable blockchain development company. Their strength and experience in blockchain development are trustworthy. If you have any intention, you can consult their company.

8. The result of these two attacks is that the other party's system is out of service or crashed e to information overload. But DoS attack is a single server attack, while DDoS attack is distributed multiple servers attack, the success of the attack is higher. The application of blockchain technology should be more and more, so it is necessary to understand the knowledge of blockchain. It is recommended that you go to the official website of Xuanling technology. This website has many popular science and application posts of blockchain technology, which should be of great help to blockchain learning.

9. 1. Cleaning and filtering of abnormal traffic:
cleaning and filtering of abnormal traffic through DDoS firewall, top technologies such as rule filtering of data packet, fingerprint detection filtering of data stream, and customized filtering of data packet content can accurately judge whether external access traffic is normal, and further prohibit filtering of abnormal traffic
2. Distributed cluster defense:
this is the most effective way for the network security community to defend against large-scale DDoS attacks. The characteristic of distributed cluster defense is that each node server is configured with multiple IP addresses, and each node can withstand DDoS attacks of no less than 10g. If one node is attacked and cannot provide services, the system will automatically switch to another node according to the priority setting, and return all the attacker's packets to the sending point, making the attack source paralyzed, From the perspective of more in-depth security protection to influence the safety implementation decision of enterprises
good soft defense can achieve the above functions at the same time, such as professional attack defense of ruisu cloud, block chain architecture encryption, seamless integration of lines, hidden source IP, large flow cleaning, unlimited anti DDoS, 100% anti CC, and trial support!

10.

If a person steals 500 yuan to 2000 yuan or more, he shall set a relatively large standard for the amount of money in the criminal law and shall file a case for investigation

according to Article 264 of the criminal law of the people's Republic of China, whoever steals public or private property in large amount or repeatedly shall be sentenced to fixed-term imprisonment of not more than three years, criminal detention or public surveillance, and shall also, or shall only, be fined; If the amount is huge or if there are other serious circumstances, he shall be sentenced to fixed-term imprisonment of not less than three years but not more than 10 years and shall also be fined

according to the interpretation of the Supreme People's Court on Several Issues concerning the specific application of law in the trial of theft cases, if the amount is especially huge or there are other especially serious circumstances, he shall be sentenced to fixed-term imprisonment of not less than 10 years or life imprisonment, and shall also be fined or have his property confiscated; In any of the following circumstances, the offender shall be sentenced to life imprisonment or death penalty, and shall also be sentenced to confiscation of property:

(1) stealing financial institutions, the amount of which is especially huge

(2) stealing precious cultural relics, if the circumstances are serious

Article 1 according to the provisions of Article 264 of the criminal law, the act of secretly stealing a large amount of public or private property for the purpose of illegal possession or repeatedly stealing public or private property constitutes theft

(1) the amount of theft refers to the amount of public and private property stolen by the perpetrator

(2) attempted theft, if the circumstances are serious, such as taking a huge amount of property or national precious cultural relics as the target of theft, shall be convicted and punished

(3) stolen public and private property, including electricity, gas, natural gas, etc

(4) stealing the property of one's own family or close relatives is generally not a crime; If it is necessary to investigate the criminal responsibility, the punishment should also be different from those who commit crimes in society

Article 2 "for the purpose of making profits" in article 265 of the criminal law refers to the act of seeking economic benefits for sale, rent, self use, transfer, etc

Article 3 the standards of "large amount", "huge amount" and "especially huge amount" of theft of public and private property are as follows:

(1) "large amount" refers to personal theft of public and private property with a value of more than 500 yuan to 2000 yuan

(2) if an indivial steals public or private property with a value of 5000 yuan to more than 20000 yuan, it is a "huge amount"

(3) if an indivial steals public or private property with a value of 30000 yuan to more than 100000 yuan, the amount is "extremely huge"

The higher people's courts of all provinces, autonomous regions and municipalities directly under the central government may, according to the economic development situation of the region and taking into account the social security situation, respectively determine the standards of "large amount", "huge amount" and "especially huge amount" to be implemented in the region within the amount range specified in the preceding paragraph

extended information:

Case: a man entered a villager's house in the same village to steal money, only to be monitored and photographed

knowing that he's home in the same village had been stolen once, he was on guard. On the 19th, Guo, a man from Shan county, who was short of money, broke into the house while he was away. Unexpectedly, he's home was installed with a camera after the last theft, The whole process of Guo's theft was recorded

according to the video information provided by Mr. He, the theft happened at about 15:00 on January 19. The video picture in the yard captured the thief prying the lock, and the camera in the room captured the whole process of the thief's theft: a man wearing a black down jacket and a white hand cover rummaged through the room and stole 1800 yuan of cash from Mr. He's home

Mr. he identified the man as Guo from the same village through the camera, so he reported the case to Caozhuang police station of Shan County Public Security Bureau. According to the monitoring data, the police of Caozhuang police station of Shan County Public Security Bureau arrested Guo in his home on the same day

it turns out that the Chinese New Year is coming, and the family is asking for more money. Mr. Guo is short of money. I heard from the villagers that Mr. He's family had stolen money before, and I heard that Mr. He would put money at home in the future to see who would steal it

as a result, Guo became a thief and broke into the house to steal when he was not at home. However, since he had installed a camera in his home last time, the whole process of Guo's theft was recorded. At present, suspect Kwok has been detained by the Shanxian County Public Security Bureau. p>