UTC blockchain and Feiniu gold
bitcoin is equivalent to digital gold. As a generally recognized equivalent, gold naturally has monetary properties and has been regarded as a kind of currency since ancient times. Bitcoin was born in 2009 and created by a person named Nakamoto. As the earliest digital currency, it was worthless at the beginning of creation. Until 2017, the highest transaction price of bitcoin exceeded 30000 RMB. The reasons why bitcoin became a valuable digital currency are as follows:
first of all, it is like gold, as a natural mineral, The total amount of bitcoin is limited. Bitcoin can not be over issued according to its own algorithm, so there will be no rapid devaluation of currency e to excessive currency issuance. The number of bitcoin is controlled to no more than 21 million e to the algorithm, so it can not be issued in large quantities, so its value is guaranteed
From the current mainstream blockchain projects, blockchain projects are mainly divided into four categories: the first category: currency; The second is platform; The third category: application category; The fourth type: asset token
currencies mainly act as the "exchange media" in the field of blockchain assets, and the exchange media refer to general equivalents, such as gold and silver bills in the past< (currency exchange on trading blockchain assets)
platform projects refer to the establishment of technical platforms to meet the needs of various blockchain application development, which can rece the threshold of application development on blockchain
application projects cover a wide range of fields, including finance, social networking, games, property rights protection, etc., and are also the fastest growing fields of blockchain assets
asset token project refers to the blockchain mapping of physical assets, that is, the physical assets on the chain. At present, there are no more than 10 varieties
01 currency
the first category is currency project, which is also the earliest blockchain project. Currency projects mainly include bitcoin and lightcoin. In addition, there is another kind of asset with the characteristics of anonymity. Its main functions include protecting the privacy of both sides of payment while realizing payment. The well-known ones are dash, monero and zcash. Currency is mainly used as the "exchange medium" in the field of blockchain assets. The exchange medium is the general equivalent you use to exchange goods. For example, gold, silver and silver bills can be used as the exchange medium in the past. At present, there are more than 2100 types of digital assets in the world, and the number of currency blockchain projects has increased rapidly recently. As of June 2018, bitcoin is still the largest market value
02 platform type
the second type is platform type blockchain project. The main function of platform type blockchain project is to establish a technical platform to meet the technical requirements of various blockchain application development; In short, platform applications allow developers to directly issue digital assets and write smart contracts on the blockchain. Smart contract is a computer program running on the blockchain database, which can be automatically executed under the conditions of its source code setting
for example, you develop a smart contract based on the house rent protocol on the blockchain. When the owner receives the rent, it will trigger the automatic execution and give the security key of the apartment to the tenant
the main function of platform blockchain projects is to establish the underlying technology platform, so that developers can do application development on the underlying technology platform. A considerable number of platforms are still in the development state. As of June 2018, Ethereum has the largest market value
03 application
the third category is application blockchain projects. Application projects are blockchain projects based on blockchain development platform (such as Ethereum), which can solve many problems in various fields of the real economy
for example, augur, Golem, vechain, omisego, which provides asset exchange and transfer services. Using blockchain technology, these projects can better solve the problems of trust and cross-border circulation. At the same time, using smart contracts and tokens on the blockchain, they can better realize automatic execution and greatly improve the efficiency of social and economic activities. Application blockchain projects cover a wide range of fields, including finance, social networking, games, property rights protection and so on. It is also the field with the fastest market value increment of blockchain projects at present
04 asset token
the fourth category is the asset token blockchain project. Asset token refers to linking the blockchain assets to physical assets such as gold and US dollars, which is the blockchain mapping of physical assets. As of February 2018, there are no more than 10 varieties. The typical representatives are usdt against US dollars, digix Dao against gold, Digix each token represents 1 gram of Gold Certified by the London Bullion Market Association. Asset token has the advantages of convenient transaction and safekeeping. First of all, asset token is more convenient for transaction. Because blockchain assets can be split, it has better liquidity
for example, at present, real estate needs to be transferred as a whole. If the real estate can be token, it can be split and purchased, which is more convenient for transaction. Secondly, the token of physical assets is more concive to custody. Gold is easy to wear out and cause losses in physical transactions, but there is no need for physical transfer after the token of physical assets, which is more concive to the custody of physical assets
bitcoin, a blockchain based digital currency, is often regarded as a global safe haven asset like gold. In this age of global turmoil, even gold has become unreliable and may be confiscated as India has. Some people have begun to think that bitcoin can replace gold, because bitcoin not only has the reserve capacity of gold, but also has some capabilities that gold does not have, such as low handling charges, rapid transfer capacity, decentralization and so on. With the increasing popularity of bitcoin and the decreasing volatility, the status of gold has been threatened
will bitcoin shake the status of gold?
gold has a long history, almost as long as the history of human civilization, and has withstood numerous tests in history. Bitcoin is less than a decade old, but its value has risen sharply. There is no support behind bitcoin. Of course, since the end of the gold standard, there has been no support from other currencies, except that there is no support from the central bank behind bitcoin. It's hard to predict whether bitcoin will exist in the next decade, a hundred years or even a thousand years.
blockchain technology is not only the underlying technology of bitcoin, but also the core and infrastructure of bitcoin bitcoin has been running without any centralized organization operation and management. Later, bitcoin technology was abstracted, which was called blockchain technology or distributed ledger technology
extended data:
disadvantages of blockchain technology applied to digital currency:
first, there is no circulation management organization for "decentralization" blockchain technology is essentially a distributed database system with one-way linked list logic structure and P2P network design mode, which determines that there is no unified central control system for virtual currency based on blockchain technology
Second, it is difficult to effectively control the quantity supply the circulation of virtual currency based on blockchain technology is fixed, and according to Fisher Equation, the total transaction volume of the whole society under a certain price level in a certain period has a certain proportion with the required nominal currency volume, while the constant currency volume obviously can not meet the requirements of the growing total price of social goods Thirdly, "mining mechanism" is difficult to create recognized value bitcoin itself has no value and no national credit support. Some people think that "by continuously consuming computing power and energy to inject value into virtual currency", but it is obviously not the most efficient choice to consume millions of calculations in order to find a hash value that meets the requirements Fourthly, procers and early holders are easy to get high seigniorage any virtual currency based on blockchain technology is held by a few people at the initial stage of its development. Take bitcoin as an example. At first, bitcoin was only a proct of a few people's game. The first bitcoin purchase in May 2010 was $10000 BTC's purchase of $25 pizza. The first bitcoin transaction completed in July of the same year was $0.04/btcOften when we talk about value, we will naturally relate to price. Indeed, price is an important data to measure value. As a blockchain technology, bitcoin's price reached 140000 RMB when it was high, and now it has dropped by about 50%, but it is still as high as 80000 RMB
At this point, you may have understood: if people do not have a common understanding of a thing, and do not give value to a thing, many things will not become "valuable". Just like our understanding of air and food, it is necessary for us to live and survive! This is the "consensus". We all believe that if we want to live, these two are indispensable! Therefore, we can conclude that the essence of value is consensus. What is the value consensus of virtual currency? Most people think that the essence of currency is not consensus, but the credibility and authority of the ruling government. This is not unreasonable. The government can only be one of the sources of value consensus, so most people think it is not comprehensive. In today's society, our consensus on the value of things comes from many ways, such as: Endorsement of authoritative institutions, corporate credit, religious belief, support of scientific theorymoney is widely accepted as a medium of exchange. Gold is classified as money, which can be traced back to the early capitalism. At that time, gold could be used to exchange anything, but it didn't play much role. Gold is often in short supply. As a tradable tool and asset currency, it can be exchanged for a certain amount of US dollars
bitcoin has now become a means of online and offline payment, which has been accepted by many countries, but it has not been accepted by the whole world
2. The two are not irreplaceable: gold was used a long time ago, but it was rarely found and created by substitutes like gold. Bitcoin has many substitutes. Who knows what other encrypted electronic currency and technology will destroy the current market
3. Gold is a commodity, but bitcoin is not
gold is a basic commodity or hard asset that can be used in business, and can be used as a material to proce other commodities. People can also use gold for physical delivery and then make it into some other form for use. Although bitcoin is storable, it is not physical and cannot be held, felt or transferred
4. Are bitcoin and gold risk averse
bitcoin and gold are rare, their prices may be volatile, and each of them serves as an alternative investment to those who lack confidence in fiat money and monetary policy. Bitcoin trading is not as easy as gold, because people have to buy bitcoin through online trading platforms or invest in over-the-counter bitcoin trusts.
1. The use of cryptography technology, encryption and decryption, so that records can not be tampered with. Common blockchain encryption methods include hash algorithm, RSA algorithm, elliptic curve algorithm, etc
2. The huge amount of computation needs to be supported by a reasonable reward mechanism. Because every transaction has to be recorded, so far, bitcoin's blockchain has more than 60 g's. Each new transaction needs to confirm all the information related to the transaction account to make sure that the transaction is effective. The huge amount of calculation needs powerful computer to complete
in order to encourage powerful computing power to participate, bitcoin gives two kinds of rewards: one is to issue a certain amount of bitcoin to these computers every day; the other is to issue a certain amount of bitcoin to these computers every day; Instead, all transfer fees will be awarded to these computers The technical term of these computers is "miner", and the person who owns the miner is called "miner"
coin China has made efforts in asset digitization and launched a digital currency crowdfunding platform, coin China.
What is a timestamp? Time stamp is a complete and verifiable data that can represent the existence of a data at a specific time point. So what's the use of timestamps
function of time stamp
the client is making a request to the server interface. If the request information is encrypted and intercepted by a third party, the request packet can be used for repeated request operation. If the server does not carry out anti replay attack, the server pressure will increase, and the use of timestamp can solve this problem
tamper proof: the common way to use is to splice parameters, the current project appkey, the "key" agreed by both parties, and add them to the dictionary dictionary set, sort them according to ABCD order, and finally encrypt them in MD5 +. The client sends the encrypted string and request parameters to the server together. After splicing and encrypting according to the above rules, the server compares whether it is equal to the incoming encrypted string
anti multiplexing: encryption in the above way can not solve the problem of anti multiplexing. At this time, it is necessary to generate UTC timestamps on the client and the server respectively. This UTC is to prevent your client and the server from not being in the same time zone, hehe, Then the timestamp can be spelled in the ciphertext, as for the effectiveness of anti reuse. Time stamp technology web link