Bitcoin Mobile Wallet
Publish: 2021-04-15 07:00:23
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. After entering the website, click the icon at the bottom of the top right corner, get a free bitcoin wallet. Click to enter, you are required to fill in the registration email password and other information. I think if you have bitcoin in your wallet, you should send it to others. Click send, input the address of the other party or scan the QR code of the address of the other party to send bitcoin.
3. Fire coin is an exchange, and the procts related to fire coin are not bitcoin wallets in the original sense (even if fire coin names the proct XX wallet, it is still not bitcoin wallets). In fact, it's just the difference between onchain and offchain
a real bitcoin wallet can generate its own private key (address). Where the private key is kept by others is not a bitcoin wallet.
a real bitcoin wallet can generate its own private key (address). Where the private key is kept by others is not a bitcoin wallet.
4. 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.
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.
5. Bitcoin wallet stores your bitcoin information, including bitcoin address (similar to your bank card account number) and private key (similar to your bank card password). Just like a physical wallet can store multiple bank cards, a bitcoin wallet can also store multiple bitcoin addresses, as well as an independent private key corresponding to each bitcoin address. The core function of bitcoin wallet is to protect your private key. If the wallet is lost, you will lose the bitcoin forever. There are many forms of bitcoin wallets, such as PC or mobile wallet clients, online web wallets, and even small notebooks (paper wallets) or brains (brain wallets) that record the private key of bitcoin. You can choose the right wallet according to your needs. As the saying goes, "don't put eggs in one basket", using a variety of ways to disperse storage is also an effective way to rece risk.
6. There are many bitcoin wallets. The operation of bitcoin wallets is relatively simple, the data is secure, and they can arrive at the account quickly. No matter how much you say, you still need to feel deeply. You can just register and try.
7. Pay and collect bitcoin with your Android phone. This is a full-featured bitcoin wallet. Please note that this app is still being tested and there is still a possibility of losing bitcoin
8. There are a lot of bitcoin wallets. The operation of PayPal is relatively simple, the data is safe, and it can arrive at the account quickly. No matter how much you say, you still need to feel deeply. You can just register and try.
9. At present, there are a lot of digital currency wallets on the market. It is recommended to choose a well-known and official wallet, which is relatively safe. For example: bitpie wallet, fire coin, coin security, etc., but at present these apps can't be downloaded, you need to use a foreign account login app store to search.
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