Which technology makes bitcoin expand

1. blockchain. The following is a detailed introction of bitcoin from AEX exchange coin network:
the concept of bitcoin was first proposed by Nakamoto in 2009. According to Nakamoto's idea, the open source software was designed and released, and the P2P network on it was built. Bitcoin is a kind of P2P digital currency. Point to point transmission means a decentralized payment system. Unlike most currencies, bitcoin does not rely on specific currency institutions. It is generated by a large number of calculations based on specific algorithms. Bitcoin economy uses the distributed database composed of many nodes in the whole P2P network to confirm and record all transactions, and uses the design of cryptography to ensure the security of all aspects of currency circulation. The decentralized nature of P2P and the algorithm itself can ensure that it is impossible to artificially manipulate the value of bitcoin by mass manufacturing. The design based on cryptography can make bitcoin only be transferred or paid by the real owner. This also ensures the anonymity of money ownership and circulation transactions. The biggest difference between bitcoin and other virtual currencies is that the total amount of bitcoin is very limited and it has a strong scarcity. The monetary system used to have no more than 10.5 million in four years, after which the total number will be permanently limited to 21 million. Bitcoin can be cashed and converted into the currency of most countries. Users can use bitcoin to buy some virtual goods, such as clothes, hats and equipment in online games. As long as someone accepts it, they can also use bitcoin to buy real-life goods.

2. yes. In 2017, the size of the capacity hit this "invisible wall.". Soaring costs have made bitcoin unreliable. Some users can't confirm their transactions even after waiting for many days. Bitcoin stopped growing. Many users, businesses, enterprises and investors have abandoned bitcoin. Its market share in many virtual currencies also dropped rapidly from 95% to 40%.

3. Slicing technology is one of the common methods used by developers to improve transaction throughput
in short, slicing is a partition method to divide computing power and storage workload in a point-to-point network. After slicing, each node no longer needs to deal with the transaction load of the whole network, It only needs to process the transactions in the partition (or partition)
just like the current blockchain, the information contained in the partition is jointly maintained by multiple nodes, thus ensuring the decentralization and security of the ledger. After the partition is enabled, everyone can still see all the information in the ledger, but people no longer need to process and store all the information

4. The size of each block is one megabyte, which can hold more than 1000 transaction information. If you watch it in the last bitcoin blockchain browser, you will find that each block is about one megabyte, which has reached the upper limit of the block capacity. If there are more and more transfers in bitcoin's network, Many transactions will not be packaged and confirmed in the first block after the transaction. It may take several blocks or a longer time. In the history of bitcoin, there have been several st attacks, among which many traders create a large number of small transfers in the exchange (currency exchange). The st attack is that someone creates a large number of small transfers, making a large number of transactions to be confirmed in the network, resulting in the normal transfer can not be confirmed, The confirmation time is delayed, which affects the normal operation of the network
many traders wait for two days or more before their transactions are confirmed. Although st attack is a very extreme example, the normal transfer volume of bitcoin network has far exceeded the maximum capacity it can bear. The size of each block is now one megabyte, so we should expand the capacity of bitcoin block and break through the existing limit of one megabyte, This process is called capacity expansion.

5. Responsibly speaking, the private key is everything. If you keep it yourself, there will be a lot of security risks, such as forgetting, losing and accidentally damaging the device. At this time, you can use a reliable third-party wallet, such as a coin pack. The user password of the coin pack is encrypted with salted sha-512-pbkdf2 high-strength encryption technology and stored on the server. The strength of this encryption algorithm is higher than that of the public key and private key algorithm of the special currency, and the employees of the currency package cannot obtain it. Even if the database is stolen, the user password cannot be cracked.

6. As if to smell the smell of money! The gospel of the coin ring! The first app of fomo3d in China: last
winner, a blockchain game that is hard to play over the wall, will be launched soon. Please look forward to it<
a blockchain game named
fomo3d
appeared on the Ethereum network. The game is simple and crude: as long as you are the last bidder, and the price is maintained for
24
hours, then all etafang in the prize pool will give you
in a short period of time, his prize pool has accumulated nearly
9000
eth, 3000
RMB! And the number continues to soar!

7. Download address: http://desktop.google.com/download/earth/GoogleEarthSetup.exe

following the acquisition of keyhole in October last year, Google launched a free mapping software based on satellite images for the first time. This is quite similar to the plan after the acquisition of Picasa. Google Earth functions like Google map, the company's online map service. Users can zoom in on a 3D map or get a driving guide

John Hanke, general manager of keyhole, said that Google Earth uses broadband streaming and 3D graphics technology, which is like a video game. It allows users to explore the world interactively - the nearest destination to search can be their neighbor; It could be anywhere in the world. In addition, the biggest difference between Google Earth and Google map is that Google Earth can also allow users to view the terrain and buildings by rotating the angle, adding notes to the map<

Google Earth function introction:

1. Combined with satellite images, maps, and powerful gogole search technology; Global geographic information is just around the corner
2
3. Input the destination and enlarge it directly
4. Search schools, parks, restaurants and hotels
5. Get driving guide
6. 3D terrain and buildings are provided, and the viewing angle supports tilt or rotation
7. Save and share search and favorites
8. Add your own comments.

8. Capacity expansion is a means that when a container or load is not enough to support or carry the demand of existing things, we can expand the capacity of the container or load to meet the growing demand, so as to relieve the pressure on the current container or load
at the beginning of the birth of bitcoin, Ben Cong, the founder of bitcoin, did not deliberately limit the block size. The maximum block size was 32MB, and the average block size was 1-2kb at that time
at that time, there are few bitcoin users and the transaction volume is not so large, which will not cause block congestion. However, since 2013, with the price of bitcoin rising sharply, there are more and more users, resulting in network congestion of bitcoin and rising transaction costs of users
up to now, there is a backlog of hundreds of thousands of transactions on the bitcoin blockchain. The average transaction cost of bitcoin is 376 times higher than that in September 2010. The processing speed of seven transactions per second has obviously been unable to meet the needs of users. The bitcoin community has begun to explore how to "expand the capacity" of bitcoin
by modifying the underlying code of bitcoin, the transaction processing capacity can be improved
there are two development and design schemes for bitcoin expansion, namely, the first layer and the second layer expansion technology
· the first layer of capacity expansion technology is to improve the blockchain itself, to make the blockchain itself faster and larger. Generally speaking, it is to change the content of the consensus part of the blockchain
· the purpose of the second layer expansion technology is to move the computing to the lower chain, that is, to solve the problem through the side chain technology
expansion protocol and outcome
expansion protocol generally needs the support of miners, which can be roughly divided into modifying block size, soft fork, hard fork, isolation witness and so on
take bitcoin as an example:
bitcoin is now divided into big block bitcoin cash (BCH) and isolation witness. Isolated witness is now recognized as bitcoin in the market, while big block coin is named bitcash. It can be predicted that in the future, bitcoin will focus on off chain trading. Including lightning network and side chain. These two new things are not mature at present, but they are highly expected by many people
bitcoin will develop a large number of isolated witness transactions and make more derivative technologies on the basis of isolated witness. Most likely, bitcoin will be pushed forward by technology
bitcash will focus on the development of monetary function, rece transaction friction as the main way, and gain more extensive users on the chain as the main development direction
the Xueshuo innovation blockchain Technology Workstation of Lianqiao ecation online is the only approved "blockchain Technology Specialty" pilot workstation of "smart learning workshop 2020 Xueshuo innovation workstation" launched by the school planning, construction and development center of the Ministry of ecation of China. Based on providing diversified growth paths for students, the professional station promotes the reform of the training mode of the combination of professional degree research, proction, learning and research, and constructs the applied and compound talent training system.

9. Go to Nini, the tour guide, and then click Singapore ~ ~ to get to the gorgeous central business district...
but it's depressing to come back from there... You have to go straight right from the map of the central business district, go through several strange maps, and finally walk to a wharf where there is a woman with all question marks... You can come back