Bitcoin public ledger
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bitcoin (BTC) is a digital currency with a total amount of 21 million. It has the characteristics of decentralization, globalization and anonymity, just like the Internet. It means that transferring bitcoin to the other end of the earth is as simple as sending e-mail, low-cost and unlimited. Bitcoin is also used in cross-border trade, payment, remittance and other fields
the liquidity and limitation of bitcoin determine that bitcoin can act as a monetary function equivalent to general equivalent, or as a measure of money, but this measure is not a physical measure like gold, but a digital proct
related concepts:
1. Address
the address of bitcoin world looks like this. The address itself is just a string of codes, just like your bank account number 321 million 3288372, which is used to mark an account. Everyone can have countless addresses. The address is public
2. The bank records how much money there is in the bank account
the amount of money in the bitcoin address is recorded by the whole bitcoin network. Each complete bitcoin data will record how many bitcoins are stored in this address
each node participating in the bitcoin network can save a complete of bitcoin data, and everyone has a backup on hand to prevent counterfeiting
3. The key (private key)
the key is another string of characters you only know. The key is used to operate the money in the bitcoin address. Key and address are the relationship between a key and a lock. Each address has only one password, and each password also operates a bitcoin address
with the key, you can control the money in the bitcoin address and pay to anyone. The key should be absolutely safe. The lost or deleted key can never be found, and the money in the corresponding bitcoin address can never be used
the key needs to be kept absolutely secret. Anyone who knows the key can steal all your bitcoin
4. Wallet
the transaction process of bitcoin will involve a lot of complex calculations. In order to simplify the operation, we have made wallets. The wallet has client software on the computer, and also has an online web version. The function of the wallet is to pay with a little touch, and the complicated calculation behind it is left to the wallet to complete
5. Security
if you use the computer client software, you can recommend multibit or bitcoin QT. Both are official software recommendations for the bitcoin community. The installation of these two softwares must be downloaded directly from the official website, and the check code must be checked before and after downloading. This is to prevent someone from tampering with wallet software and stealing keys
6. mining
about every 10 minutes, some new bitcoin will appear in the bitcoin network, which can be imagined as throwing money in the sky. Whose pocket these scattered money fall into mainly depends on whose computer calculates fast. The faster you calculate, the more likely you are to find the money. Mining is to use the computer to calculate, to pick up the money< br />
in fact, bitcoin can't help much in terms of anonymity. If you just want to pursue anonymity, it's better to use cash, which is the most anonymous means of currency trading, and its source can't be traced at all
bitcoin is a protocol, and transactions are broadcast to the distributed public ledger (blockchain). Everyone in the world can view the ledger in real time, track the transaction from the source to the destination, and do not need to register for authorization. It can be said that this has broken anyone's illusion of using bitcoin to seek privacy or anonymity
zero currency is the most anonymous digital currency in the world. However, all transaction information will be recorded on the blockchain, and the information on the blockchain is open and transparent. The digital currency issued by Puyin group is based on blockchain technology.
This is a data center switch, which supports virtualization, that is VSU. Configuration reference
core switch 1:
Switch1 # configuration terminal
enter configuration commands, one per line. End with cntl / Z.
Switch1 (config) # switch virtual domain 1
Switch1 (config vs domain) # switch 1
Switch1 (config vs domain) # switch 1 priority 200 -- & gt; The default priority is 100, which is configured as a higher priority. After the VSU is successfully established, it will become the management host
Switch1(config-vs-domain)# exit
Switch1(config)# vsl-aggregateport 1 ------> At least two VSL links are needed, and the reliability of one link is low. When link oscillation occurs, VSU will be very unstable
Switch1(config-vsl-ap-1)# port-member interface TenGigabitEthernet 1/1 ------> Configure VSL link, heartbeat link and traffic channel between VSU active and standby cores
Switch1 (config-vsl-ap-1) ﹥ port member interface tengigabit Ethernet 1 / 2
Switch1 (config-vsl-ap-1) ﹥ exit
core switch 2:
switch2 ﹥ configuration terminal
enter configuration commands, one per line. End with CNTL/Z.
Switch2(config)# switch virtual domain 1 ------> Domain ID must be consistent with the first one
switch2 (config vs domain) # switch 2 ----- & gt; The second device must change its ID to 2
switch2 (config vs domain) ｛ switch 2 priority 150
switch2 (config vs domain) ｛ exit
switch2 (config) ｛ VSL aggregateport 1 ----- & gt; At least two VSL links are needed, and the reliability of one link is low. When link oscillation occurs, VSU will be very unstable
Switch2(config-vsl-ap-1)# port-member interface TenGigabitEtherne 1/1 ------> Configure VSL link, heartbeat link and traffic channel between VSU active and standby cores
switch2 (config-vsl-ap-1) # port member interface tengigabit Ethernet 1 / 2
switch2 (config-vsl-ap-1) # exit
Zhejiang Xinyun blockchain Technology Co., Ltd. is a limited liability company (invested or controlled by natural person) registered in Ouhai District, Wenzhou City, Zhejiang Province on April 2, 2018. Its registered address is located in room B309, 46-54 Dongfang Road, Ouhai Economic Development Zone, Wenzhou City, Zhejiang Province (trial area of cloud sharing creative space)
the unified social credit code / registration number of Zhejiang Xinyun blockchain Technology Co., Ltd. is 91330304ma2cnkpx00, and the enterprise legal person is Xiao Kang. At present, the enterprise is in business
Zhejiang Xinyun blockchain Technology Co., Ltd., within the province, the current registered capital of the enterprise is general
view more information and information of Zhejiang Xinyun blockchain Technology Co., Ltd. through network enterprise credit
bookkeeping is done by miners
generally speaking, the correct result of Distributed Accounting is decided by the vote of "miners"
if you have a 51% pool, you can theoretically void any transaction (roll back). This is called a 51% attack
now bitcoin miners are distributed all over the world. The world's largest mine pool is in China, and the person in charge of bitcoin has promised that its total power will not exceed 50% (now about 30%), so there is no possibility of 51% attack for the time being
but it can't be said to conquer
this is the consensus issue of bitcoin. In other words, how to achieve decentralization at the same time, let the nodes of the whole network reach a consensus and keep the consistency of all accounts? This is a problem that the decentralized system could not solve for a long time in the past
Nakamoto Tsung proposed the solution of proof of work. It stipulates that the person who pays the most calculation work has a better chance to obtain the final bookkeeping right. His bookkeeping results will be recognized by the whole network. How to measure the calculation workload? Bookkeepers need to spend computer power to solve a problem called hash function. This problem can only be guessed one by one through computer enumeration. The stronger the calculation power, the easier it is to guess the right answer. Once a lucky bookkeeper finds the answer, he will get the right to keep accounts. And get a bitcoin reward. Everyone should listen to his accounting results and start new records on his basis
to put it simply, more is more. The harder you work, the luckier you are. POW solves the problem of mutual distrust nodes reaching consensus, and is considered to be the ancestor of all consensus mechanisms. It makes bitcoin a truly decentralized autonomous system.