Application of cryptography in bitcoin transaction
The remitter will pay bitcoin directly to the other party according to the address of the payee through the computer or smart phone
after the transaction data of bitcoin is packaged into a "data block" or "block", the transaction is initially confirmed. When a block is linked to a previous block, the transaction is further confirmed. After six block confirmations in a row, the transaction was irreversibly confirmed
the bitcoin peer-to-peer network stores all transaction history in the "blockchain". The blockchain continues to extend, and once new blocks are added to the blockchain, they will not be removed. In fact, blockchain is a distributed database composed of a group of scattered client nodes and all participants, which is a record of all bitcoin transaction history
extended data
users can buy bitcoin, and at the same time, they can "mine" bitcoin by using computers to perform a large number of calculations according to the algorithm. When users "mine" bitcoin, they need to use the computer to search for 64 bit numbers, and then compete with other gold miners by repeatedly solving puzzles to provide the required numbers for the bitcoin network. If the user's computer successfully creates a set of numbers, then they will get 25 bitcoins
from 2012 to 2014, bitcoin swept the world, and graally formed the "virtual currency" instry chain represented by bitcoin. This is a change in the financial instry and a new proct of the combination of the financial instry and the Internet. It represents a financial milestone in the new era and marks a new chapter in the history of the Internet. Bitcoin fund is one of the derivative procts represented by bitcoin in the era of "virtual currency"
according to the relevant news reports of Fuhui China, bitcoin fund will be open for operation in the autumn of 2014. Fuhui bitcoin fund, as the world's first operation mode of mutual benefit and win-win with financial management mode, is original and full of temptation and challenge
in the bitcoin network, each node with a client installed has a distributed database to manage bitcoin proction, transaction, query account balance records, and update and record the latest records of changes in the bitcoin system
when you want to send 10 bitcoins to your friends. You need two things, one is the bitcoin address, the other is the corresponding private key. Bitcoin addresses are different from bank accounts. You don't need to sign a bunch of documents to apply for them. They are randomly generated, just a string of letters and numbers. The private key is also a similar string, but this is strictly confidential. The bitcoin address is like a transparent piggy bank. Everyone can see what's in it, but only the person with the private key can open it.
after you send the transaction application, the surrounding nodes will check whether your account has 10 bitcoins. If there are, they will agree to the transaction, and broadcast the message to the nearby nodes, which will be transmitted from one to ten, and from ten to 100, Soon the whole network will confirm the transaction information and write it to the block. Your friend will receive 10 bitcoins, and the transaction will be completed.
if you want to send small bitcoins, in theory, digital currency can be cut infinitely. At present, the smallest bitcoin unit is called "Nakamoto Tsung", which is equivalent to 0.00000001 bitcoins.
Bitcoin is a kind of encrypted digital asset protected by cryptography, without the participation of centralized institutions. It has been running steadily since 2009 and has become one of the important investment targets of global investors. Many investors are very interested in bitcoin investment. The entry process of bitcoin and some investment procts is slightly different. The address of bitcoin blockchain is decentralized, so there is no account opening step. However, purchasing Mai bitcoin with bitcoin requires the assistance of some third-party platforms
at present, there are relatively large platforms in China, such as okex, fire coin and coin security. I have been in and out of money for many times in these platforms. Let's introce my experience of buying Mai bitcoin in these exchanges.
before the introction, I need to explain one premise: the security of Mai bitcoin is divided into two aspects: one is asset security, which basically won't cause any problems when I choose the three major domestic exchanges; the other is capital security, in other words, Is to rece as much as possible with the flow of black money bank card transactions. Because it's easy to freeze their bank cards, each exchange has a different strategy
1、OKEx： https://www.okex.me/buy-crypto/cny
okex is the exchange that I use the most Mai currency. I have been in okexmai currency since 18 years. Most of the time, I have had a good experience of Mai currency. I only encountered the problem of freezing okex account (not bank card freezing) once in my impression. However, OK customer service also helped me understand the freezing process very quickly. This is my first contact with OK customer service, Good attitude and high efficiency< it can be seen from the side that okex has done a lot of work in the prevention and control of black money. Moreover, in recent years, there are few card freezing incidents in okex. Today, the black money in the exchange is increasingly rampant, okex has done quite well
in terms of user experience, the function of one click Mai is more suitable for Xiao. When using this function, you don't need to select the businesses that meet the standard in the list of businesses. It's more convenient. At present, when you do activities, you will get a 20 yuan reward when you buy Mai for the first time
in addition, okex is a first-line exchange with a large user base. Mai currency supports wechat, and ZFB buys Mai with zero handling charge. If you've just come into contact with bitcoin, it's a quick and safe choice in okexmai
However, the weakness is that okex has little support for foreign currencies. Except for RMB, only the Vietnamese Dong and Indian Rupee have depth. The Mai currency entrance of other countries' currencies is only the interface of other cooperation platforms2 https://www.huobi.com/zh-cn/
the exchange's legal currency trading plate is deep enough, and there are many powerful businesses with good experience. Support the purchase of Mai bitcoin with multi currency. In addition, the process of making Mai coins is relatively smooth and can be completed in a few minutes
however, e to the good user experience of fire coin, black and gray procts will also choose fire coin as a channel for money laundering. fire coin has been updating its risk control strategy to intercept black money accounts. However, at present, it seems that the effect may not be so good, and the freezing card incident continues. Friends who pay close attention to the digital money market may understand that a large-scale freeze occurred in early June, and many users' bank cards were frozen. Therefore, we should be a little more cautious when using Mai coins on this platform, try to choose the ranked merchants, and rece the probability of being frozen.
3 https://www.binance.com/cn
the trading plate of currency security legal currency started late, and the accumulation was not enough. Frankly speaking, the depth and experience of legal currency trading is quite different from that of okex and fire currency< Strong>, especially the t+1 strategy of currency, which is Mai currency, will make complaints about money in a day. This system has been thrown into the trap by too many people, because this is obviously a "one size fits all" strategy with insufficient technical capability.
however, even if there are many slots, coin an is slightly better than the second and third tier exchanges in terms of asset security. Users who trade in coin an can also try to buy Mai bitcoin in coin an
finally, based on the above factors, it is suggested that okex is the first choice for Mai bitcoin, fire coin is the second choice, and coin security is not recommended
the concept of bitcoin was first proposed by Nakamoto in 2009. According to Nakamoto's ideas, open source software was designed and released, and P2P network was built on it. 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 a distributed database composed of many nodes in the whole P2P network to confirm and record all transactions, and uses cryptography design to ensure the security of all aspects of currency circulation.
in the process of information encryption and decryption, different keys are used. Only the corresponding public key can be used for decryption. Owning the private key is equal to owning the ownership of bitcoin
similarly, bitcoin users also need to pass authentication to ensure the ownership of their own cryptocurrency assets.