Bitcoin wallet label

1.

Fire coin is a bitcoin trading platform. As of the end of 2016, the accumulated turnover of fire coin reached 200 billion yuan

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

Bitcoin is different from all currencies. Bitcoin does not rely on a specific currency institution. It is generated by a large number of calculations based on a specific algorithm. Bitcoin economy uses a 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 and algorithm of P2P can ensure that it is impossible to artificially manipulate the value of bitcoin through mass proction

extended information:

fire coin business

1. Fire coin global station, headquartered in Singapore, provides digital asset trading and investment services

2. The digital asset trading platform based on Korean won provides digital asset trading services

3, China, has become a platform for information and research in vertical chain of block chain, providing regional chain technology research and application information for Chinese mainland users, and integrates services such as instry consultation, research and ecation training. p> The company is headquartered in Beijing, China, providing digital asset management services and user experience

2. I'll give you my address (address). You can find my zip code (public key). You can write to me with my zip code (public key) + address. The mail will be sent to my mail cabinet. I'll open the mail cabinet (private key) with the key I have. The key of express cabinet is stored in my wallet (wallet)
1. The mail cabinet is stolen (the database is stolen)
2. The key is stolen (the private key is stolen)
3. Knowing my home address (the public key is stolen), the lock of the mail cabinet is opened violently (the private key is cracked violently).

3.

The private key of bitcoin wallet cannot be viewed online. Bitcoin exists on the platform. To download core or classic is the real wallet, and then you can view it

[description of private key of bitcoin wallet]:

1. Wallet encryption refers to automatically encrypting and storing the wallet with private key. The official bitcoin client supports wallet encryption since version 0.4.0. The encrypted wallet will prompt you to enter your password every time you pay. If the password is wrong, the client will refuse to pay

2. If you replace it with the earliest backup wallet (wallet. DAT), you can still trade normally. Considering the principle of bitcoin, it can be concluded that as long as there is a private key (wallet), you can prove that you are the legitimate owner of the wallet. No matter whether you encrypt or delete the wallet (the core is the private key corresponding to an address), you can't deny it

3. When backing up the bitcoin wallet, you should also pay attention to the existence of bitcoin payment change mechanism (for example, if you send 50 BTC in a complete 100 BTC to an address, the system will send 50 BTC to the other party's address, and return 50 BTC to a new address of your client, which will not be directly displayed in your address list)

4. After sending bitcoin to other addresses 100 times or using 100 different addresses to receive bitcoin, please back up your wallet again, otherwise the returned and received bitcoin will be lost forever. In addition to encrypting wallets, users can also generate offline paper wallets and brain wallets

4. Public private key is peer-to-peer encryption. You can see RSA encryption

only the private key can decrypt the content encrypted by the private key
only the public key can decrypt the content encrypted by the private key
here, the public key is your bitcoin ID, and the private key is your wallet

when using bitcoin, you should take care of your wallet, and you'd better encrypt it with a password, You can use your bitcoin

there are many bitcoin trading platforms on the Internet, and you can find a lot of them by Google search
generally, you need to mine bitcoin, and there are also mining platforms on the Internet, but now the income is low, and the display card is burned

5. Bitcoin was born in a paper in 2008
a person signed by Nakamoto Tsui has put forward a revolutionary idea: let's create a currency that is not controlled by the government or anyone else! This idea is crazy: there is no asset support behind a string of figures, and no one is responsible for it. How can anyone accept it when you pay it to the other party as money
Merkle tree
looks like a binary tree, but this is the lower two nodes. Take the hash value to get the upper node. Just remember the root node to detect whether the whole tree has been tampered
the root hash value is stored in the block header, and the transaction process is stored in the block body. All nodes include block header and block body, but light nodes (such as bitcoin wallets on mobile phones) only include block header. This tree can prove that a transaction has been written into the blockchain
3. Consensus agreement
two issues should be paid attention to in decentralized currency:
1. Who can issue digital currency: mining
2. How to verify the legitimacy of transactions: blockchain
double spending attack
double spending attack is a major challenge of digital currency
all transactions in bitcoin have input and output. Where does bitcoin come from and where does it go
under normal circumstances, there may be two bifurcations, because two nodes obtain the bookkeeping right at the same time, and the two nodes package the block and calculate the random number at the same time. At this time, the two bifurcations will coexist temporarily until one of the blocks finds the next block first, which becomes the longest legal chain, and the other one is discarded<

Sybil attack
a malicious node keeps generating accounts. If the total number of accounts exceeds half of the total accounts, it obtains the control of the blockchain

consensus protocol in bitcoin
some nodes are malicious, and most nodes are good

idea 1: pack some transactions into blocks as candidate blocks, let each block vote, and write them into the blockchain if they pass

No, because some malicious nodes have been publishing blocks containing malicious transactions, and they have been voting and occupying resources. And some nodes don't vote<

idea 2: vote not by the number of accounts, but by computing power. Each node can generate legal transactions and put them into the block. These nodes start to try random numbers until H (block header) ≤ target is found, then this node has the right to account

the only way to generate bitcoin
coinbase transaction. There is no need to point out the source of the currency. If you have the bookkeeping right, you will get a reward< br />
50BTC-> 25BTC-> 12.5btc, the reward will be halved for every 210000 bitcoins

the process of bitcoin competing for bookkeeping rights is called mining. The node competing for bookkeeping right is called miner.

6.

What are the wallets in our lives? Put your money, cards, and mobile phone, money and bank cards are issued by the bank. Mobile phone Alipay WeChat payment is paid through the third party, which is completely decentralized, and how it will be stored and retained? Besides being placed in the exchange, it can also be placed in the wallet. What are the types of bitcoin wallets? How to achieve point-to-point decentralization? Blockchain wallet is not used to hold money?! Have you stepped on thunder

miaozhou blockchain issue 08 can teach you to identify the mistakes of blockchain wallet. More blockchain beginners are welcome to pay attention to Babbitt's miaozhou blockchain

7. Bitcoin wallet is a big download, because it needs to synchronize a lot of historical transaction data

8. EB is one of the sides of the triangle △ EBC.

9. At present, most of the angel investors in China are business owners, bosses, senior executives and some entertainment stars. They are well-known and specialized in angel investment, such as Lei Jun, Xue Manzi, Zhu Min, Deng Feng, Zhang Xingsheng, Liu Xiaosong, Qian Yongqiang, Li Zhenzhang, Liu Xiaoren, Yang Ning, Shen NANPENG, Zhang Xiangning, Zhou Hongyi, Jiang Xipei, Zheng Xiaojun, Mai Gang, etc. They have sufficient investment experience and can judge which projects are better and which are worse. The most important thing is that they all look at people, that is, talents and teams. It has been said that the development speed of the invested enterprises depends on the growth speed of the founders. If the talents are strong, the projects will not be too bad and it is worth investing. However, there are few specialized training investment in the market, and many people do not have the experience of investment projects, so it is more difficult to obtain wealth from this aspect. Therefore, it is very important to train investors in schools. It is also right to set up angel investor colleges. This is a good direction and beneficial to the country. Compared with foreign countries, what China lacks most is that there are too few angel investors. In addition to the well-known bosses and elites of some start-up companies, there are few ordinary people who can control investment and successfully invest in projects. China angel investor college is a necessary proct of society and market. Our country also attaches great importance to ecation, and has been advocating the development of science and ecation to rejuvenate the country. The state also very much agrees with the investor Training Institute. I believe that there will be more angel investor colleges in the future. In the future, China will have more angel investors like foreign countries, so our country will make more progress.