Branch of bitcoin

1.

The concept of bitcoin was first proposed by Nakamoto on November 1, 2008, and was officially born on January 3, 2009. According to the idea of Nakamoto, the open source software is designed and released, and the P2P network on it is constructed. Bitcoin is a virtual encrypted digital currency in the form of P2P. Point to point transmission means a decentralized payment system

unlike all 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

extended data:

bitcoin network generates new bitcoin through "mining". In essence, the so-called "mining" is to use computers to solve a complex mathematical problem to ensure the consistency of bitcoin network distributed accounting system

to mine bitcoin, you can download the special bitcoin computing tools, register various cooperation websites, fill the registered user name and password into the computing program, and then click the operation to officially start

the bitcoin network is robust, but the bitcoin trading platform is fragile. Trading platform is usually a website, which will be attacked by hackers or shut down by competent authorities

2.

The capacity of a block in bitcoin is 1m (megabytes). A transaction is between 250 and 500 bytes

according to this algorithm, a block contains about 4194.3 transactions

the confirmation time of a block in bitcoin is 10 minutes, so the seven transactions that a block can process per second may sometimes be less than seven

What are the consequences

The bifurcations of

bitcoin are divided into hard bifurcations and soft bifurcations

hard fork means that when the block format or transaction format of bitcoin changes, the UN upgraded nodes refuse to verify the blocks proced by the upgraded nodes

the upgraded nodes can verify the blocks proced by the non upgraded nodes, and they continue the chain they think is correct, so they are divided into two chains

What is soft bifurcation

soft bifurcation means that when the data structure of bitcoin transaction changes,

UN upgraded nodes can verify the blocks proced by upgraded nodes,

and upgraded nodes can also verify the blocks proced by UN upgraded nodes

3. Is a virtual digital currency, non official currency, but has a certain degree of consensus

4. You are right. Indeed, it will be rolled back. If the transaction is unfortunately packaged on the fork, the transaction is likely to be cancelled after the main chain is synchronized

the reason why we need six confirmations is that it is more difficult to obtain the optimal solution (to prevent single node fraud). One block may also be able to get an optimal solution, and it is basically impossible to get six blocks together. It has nothing to do with bifurcation

5. After level 70, about 1 ignore = 4 panel attack, when the equipment is normal.

6. Bitcoin
the initials of bitcoin are used to represent the concept of bitcoin or the whole bitcoin network itself. For example: "today I learned something about the bitcoin agreement."
bitcoin without capital letters indicates a unit of account. For example: "I transferred 10 bitcoin today." The unit is also usually abbreviated as BTC or XBT
bitcoin address
a bitcoin address is like a physical address or an email address. This is the only information you need to provide when someone pays you bitcoin. An important difference, however, is that each address should only be used for a single transaction
peer to peer network
peer to peer network is a system that allows a single node to interact directly with other nodes, so that the whole system can operate like an organized collective. For bitcoin, the bitcoin network is built in such a way that each user is spreading the transactions of other users. And importantly, there is no need for the bank to be a third party
hash rate
hash rate is a measure of bitcoin network processing capacity. In order to ensure security, bitcoin network must carry out a lot of mathematical operations. When the network reaches a hash rate of 10th / s, it can perform 10 trillion calculations per second
transaction confirmation
transaction confirmation means that a transaction has been processed by the network and is unlikely to be revoked. When a transaction is included in a block, an acknowledgement is received, and each subsequent block corresponds to an acknowledgement. For a small amount of transaction, a single confirmation can be regarded as safe. However, for a large amount of transaction such as US $1000, it is reasonable to wait for more than six confirmations. Each confirmation exponentially reces the risk of cancellation
blockchain
blockchain is a public record of bitcoin transactions in chronological order. The block chain is shared by all bitcoin users. It is used to verify the permanence of bitcoin transactions and prevent double consumption
cryptography
cryptography is a branch of mathematics, which allows us to create mathematical proofs that can provide high security. Cryptography is also used in e-commerce and online banking. For bitcoin, cryptography is used to ensure that no one can use the money in other people's wallets or break the blockchain. Cryptography is also used to encrypt wallets, so you can't use wallets without a password<
signature
cryptography signature is a mathematical mechanism for people to prove ownership. For bitcoin, a bitcoin wallet is associated with its private key by some mathematical magic. When your bitcoin software signs a transaction with the corresponding private key, the whole network will know that the signature matches the spent bitcoin. However, no one in the world can guess your private key to steal your hard-earned bitcoin
wallet
bitcoin wallet is roughly the equivalent of physical wallet in bitcoin network. The wallet actually contains your private key, which allows you to consume the bitcoin allocated to the wallet in the block chain. Like a real wallet, each bitcoin wallet displays the total balance of all bitcoins it controls and allows you to pay someone a certain amount of bitcoin. This is different from the credit card used by merchants to dect money
block
a block is a record in the block chain, which contains and confirms the transactions to be processed. On average, a new block containing transactions is added to the block chain by mining every 10 minutes
double consumption
If a malicious user tries to pay bitcoin to two different payees at the same time, it is called Double consumption. Bitcoin mining and blockchain will reach an agreement on the network that one of the two deals will be confirmed and considered valid
private key
the private key is a secret data block that proves that you have the right to consume bitcoin from a specific wallet. It is implemented through a cryptographic signature. If you are using wallet software, your private key is stored in your computer; If you are using an online wallet, your private key is stored on a remote server. Don't disclose private keys, because they allow you to consume the bitcoin in the corresponding bitcoin wallet
Mining
bitcoin mining is a process of using computer hardware to do mathematical calculation for bitcoin network to confirm transactions and improve security. As a reward for their service, miners can get the Commission included in the transaction they confirm, as well as the newly created bitcoin. Mining is a professional and competitive market. The bonus is divided according to the amount of calculation. Not all bitcoin users mine, and it's not easy to make money from mining
bit
bit is a common unit used to indicate the sub unit of a bitcoin - 1000000 bit is equal to 1 bitcoin (BTC or B & 8422;), This unit is more convenient for marking tips, goods and service prices
BTC
BTC is used to mark a bitcoin (B & 8422;) The common unit of.

7. Bitcoin

the initials of bitcoin are used to represent the concept of bitcoin or the whole bitcoin network itself. For example: "today I learned something about the bitcoin agreement."
bitcoin without capital letters indicates a unit of account. For example: "I transferred 10 bitcoin today." The unit is also usually abbreviated as BTC or XBT

bitcoin address

bitcoin address is like a physical address or an e-mail address. This is the only information you need to provide when someone pays you bitcoin. An important difference, however, is that each address should only be used for a single transaction

peer to peer network

peer to peer network is a system that allows a single node to interact directly with other nodes, so that the whole system can operate like an organized collective. For bitcoin, the bitcoin network is built in such a way that each user is spreading the transactions of other users. And importantly, there is no need for the bank to be a third party<

hash rate

hash rate is a measure of bitcoin network processing capacity. In order to ensure security, bitcoin network must carry out a lot of mathematical operations. When the network reaches a hash rate of 10th / s, it can perform 10 trillion calculations per second

transaction confirmation

transaction confirmation means that a transaction has been processed by the network and is unlikely to be revoked. When a transaction is included in a block, an acknowledgement is received, and each subsequent block corresponds to an acknowledgement. For a small amount of transaction, a single confirmation can be regarded as safe. However, for a large amount of transaction such as US $1000, it is reasonable to wait for more than six confirmations. Each confirmation exponentially reces the risk of cancellation

blockchain

blockchain is a public record of bitcoin transactions in chronological order. The block chain is shared by all bitcoin users. It is used to verify the permanence of bitcoin transactions and prevent double consumption<

cryptography

cryptography is a branch of mathematics, which allows us to create mathematical proofs that can provide high security. Cryptography is also used in e-commerce and online banking. For bitcoin, cryptography is used to ensure that no one can use the money in other people's wallets or break the blockchain. Cryptography is also used to encrypt wallets, so you can't use wallets without a password<

signature

cryptography signature is a mathematical mechanism that allows people to prove ownership. For bitcoin, a bitcoin wallet is associated with its private key by some mathematical magic. When your bitcoin software signs a transaction with the corresponding private key, the whole network will know that the signature matches the spent bitcoin. However, no one in the world can guess your private key to steal your hard-earned bitcoin

wallet

bitcoin wallet is roughly the equivalent of physical wallet in bitcoin network. The wallet actually contains your private key, which allows you to consume the bitcoin allocated to the wallet in the block chain. Like a real wallet, each bitcoin wallet displays the total balance of all bitcoins it controls and allows you to pay someone a certain amount of bitcoin. This is different from the credit card used by merchants to dect money

block

a block is a record in the block chain, which contains and confirms the transactions to be processed. On average, a new block containing transactions is added to the block chain by mining every 10 minutes

al consumption

If a malicious user tries to pay bitcoin to two different payees at the same time, it is called al consumption. Bitcoin mining and blockchain will reach an agreement on the network that one of the two deals will be confirmed and considered valid

private key

the private key is a secret data block that proves that you have the right to consume bitcoin from a specific wallet. It is implemented through a cryptographic signature. If you are using wallet software, your private key is stored in your computer; If you are using an online wallet, your private key is stored on a remote server. Don't disclose private keys, because they allow you to consume the bitcoin in the corresponding bitcoin wallet

Mining

bitcoin mining is a process of using computer hardware to do mathematical calculation for bitcoin network to confirm transactions and improve security. As a reward for their service, miners can get the Commission included in the transaction they confirm, as well as the newly created bitcoin. Mining is a professional and competitive market. The bonus is divided according to the amount of calculation. Not all bitcoin users mine, and it's not easy to make money from mining

bit

bit is a common unit to indicate the sub unit of a bitcoin - 1000000 bit is equal to 1 bitcoin (BTC or B & # 8422;), This unit is more convenient for marking tips, goods and service prices

BTC

BTC is used to mark a bitcoin (B & 8422;) The common unit of.

8.

The smallest unit of bitcoin is Cong

in addition to Cong, bitcoin also has other units: bitfen, millibit and microbit. Where 1 BTC = 100 CBTC = 1000 mbtc = 1 million μ BTC = 100 million

bitcoin is similar to e-cash of e-mail, and both parties need "bitcoin wallet" similar to e-mail and "bitcoin address" similar to e-mail address. Just like sending and receiving e-mail, the remitter pays bitcoin directly to the other party through a computer or smart phone according to the recipient's address

extended data:

starting from the essence of bitcoin, the essence of bitcoin is actually the special solution generated by a bunch of complex algorithms. A special solution is one of the finite solutions of a system of equations. Every particular solution can solve the equation and is unique

in the metaphor of banknotes, bitcoin is the number of the top word of a banknote. If you know the number of the top word on a banknote, you have the banknote. The process of mining is to constantly seek the special solution of the equation system through huge amount of calculation. The equation system is designed to have only 21 million special solutions, so the upper limit of bitcoin is 21 million

9.

Bitcoin is a virtual encrypted digital currency in the form of P2P

the concept of bitcoin was first proposed by Nakamoto on November 1, 2008, and was officially born on January 3, 2009. According to the idea of Nakamoto, the open source software is designed and released, and the P2P network on it is constructed

unlike all 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

extended data

features of bitcoin:

1. Circulation around the world: bitcoin can be managed on any computer connected to the Internet. No matter where you are, anyone can dig, buy, sell or collect bitcoin

2. Exclusive ownership: private key is needed to control bitcoin, which can be stored in any storage medium in isolation. No one can get it except the user himself

3. Low transaction cost: bitcoin can be remitted free of charge, but a transaction fee of about 1 bitfen will be charged for each transaction to ensure faster transaction execution

10.

bus line: metro line 15, the whole journey is about 4.3km

1. Take Metro Line 15 from Fengbo, pass 2 stations, and reach Shimen station

2. Walk about 390 meters to Shunyi District Community Ecation Center, Beijing