Several public chains of digital currency
blockchain includes public blockchain, joint (instry) blockchain and private blockchain. Public chain point-to-point e-cash system: bitcoin, smart contract and decentralized application platform: Ethereum
blockchain is a new application mode of distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm and other computer technologies
blockchain is an important concept of bitcoin. In essence, it is a decentralized database. At the same time, as the underlying technology of bitcoin, it is a series of data blocks generated by using cryptographic methods. Each data block contains a batch of bitcoin network transaction information, Used to verify the validity of its information (anti-counterfeiting) and generate the next block
extended data
according to the different degree of blockchain network centralization, three kinds of blockchains under different application scenarios are differentiated:
1. The blockchain with the whole network open and without user authorization mechanism is called public chain
2. The authorized nodes are allowed to join the network, and the information can be viewed according to the authority. It is often used in the inter agency blockchain, which is called alliance chain or instry chain
3. All the nodes in the network are in the hands of one organization, which is called private chain
alliance chain and private chain are also called licensing chain, and public chain is called non licensing chain
blockchain features
1, decentralization. Blockchain technology does not rely on additional third-party management institutions or hardware facilities, and there is no central control. In addition to the self-contained blockchain itself, each node realizes information self verification, transmission and management through distributed accounting and storage. Decentralization is the most prominent and essential feature of blockchain
2. Openness. Blockchain technology is based on open source. In addition to the private information of all parties involved in the transaction is encrypted, the data of blockchain is open to everyone. Anyone can query blockchain data and develop related applications through the open interface, so the information of the whole system is highly transparent
3. Independence. Based on consensus specifications and Protocols (similar to various mathematical algorithms such as hash algorithm used by bitcoin), the whole blockchain system does not rely on other third parties, and all nodes can automatically and safely verify and exchange data in the system without any human intervention
4. Safety. As long as 51% of all data nodes cannot be controlled, the network data cannot be arbitrarily manipulated and modified, which makes the blockchain itself relatively safe and avoids subjective and artificial data changes
5. Anonymity. Unless there are legal requirements, technically speaking, the identity information of each block node does not need to be disclosed or verified, and the information can be transferred anonymously
issued based on Ethereum public chain should be observed according to the price trend of the platform.
1. Bithumb
bithumb is the largest digital currency exchange in South Korea and the top ten in the world in terms of trading volume. Its daily trading volume exceeds 13000 bitcoins, accounting for about 10% of global bitcoin trading volume. It promises to provide the lowest handling charge in the world. Bithumb accounts for 75.7% of South Korea's bitcoin market, 10% of the global bitcoin market, and 50% of South Korea's Ethereum market
Bitmex is established in the Republic of Seychelles as a leading leverage trading platform. It can operate cryptocurrency derivatives trading as high as 100 times leverage, and also provide high leverage for other digital currency procts. Bitmex offers more than a dozen futures and swap procts. Bitcoin is one of the most active trading varieties, which can be divided into three types: xbtz17 (bitcoin / USD futures), xbjz17 (bitcoin / yen futures) and xbtusd (bitcoin / USD perpetual swap)
to register a bitmex account, just fill in the email, password and country. The name can be left blank. Bitmex does not accept the recharge and withdrawal of legal currency, so it does not have to follow the bank's KYC / AML requirements to obtain the user's personal information
Okex
3, okex
okex mainly provides global users with spot and derivative trading services of digital assets such as bitcoin, lightcoin and ethereal currency, which is subordinate to okex Technology Company Limited. Since 2014, we have been committed to providing bitcoin, lightcoin, ethercoin and other digital asset currency and derivatives trading services to global users, adopting advanced technologies such as GSLB, distributed server cluster, distributed storage, high-speed memory trading engine with multi machine mutual backup, cold wallet, hot money package with private key offline, etc
As one of the most concerned companies in the international blockchain instry, Qian'an is jointly founded by Zhao CHANGPENG, former blockchain CTO, a well-known blockchain company, and He Yi, former vice president of science and technology, to provide users with more secure and convenient digital currency exchange services and aggregate global high-quality digital currencies, It is committed to building a world-class blockchain asset trading platform. Only 50 days after its launch, the company's users have covered more than 180 countries around the world. This is the first time that the company has disclosed its financing information
5. Hotcoin is one of the three major exchanges in China. Headquartered in Beijing, it also has many exchanges, including domestic stations, international stations, quantitative trading, etc. hotcoin is a domestic station. Since its establishment in 2013, the accumulated trading volume of hotcoin has exceeded $100 billion, once becoming the largest digital asset trading platform in the world, It occupies 50% of the global share of digital asset transactions, and has been invested by Zhenge fund and Sequoia Capital
fire coin group has invested in more than 10 upstream and downstream enterprises, and has completed the establishment of compliance service teams in Singapore, South Korea, Hong Kong, Thailand, Australia, Canada, Brazil, Britain and other countries and regions, providing secure and reliable digital asset trading and asset management services for millions of users in more than 130 countries
6, bibox
bibox is the world's first artificial intelligence digital asset trading platform, which innovatively realizes transaction security, platform stability and operation convenience; Financial derivatives services are well-known in the instry. The platform not only provides spot trading, but also provides financing, currency financing and contract trading business. Investors can carry out long short two-way operation. They can obtain the income from the rise in the price of digital assets by buying long and obtain the income from the fall in the price of digital assets by selling short, which is convenient for traders to invest and hedge
Hitbtc
7, hitbtc
hitbtc was established in 2013 and obtained 6 million euro venture capital. Headquartered in Europe, it is a bitcoin trading platform in the UK, supporting the current mainstream encrypted digital currency portfolio trading, including BCC / BTC, ETH / BTC, XmR / BTC, LTC / BTC, EOS / BTC, EOS / eth, etc. at present, there are 762 trading pairs. Hitbtc is operated by hit Solutions Limited in Hong Kong and has a dedicated support and communications office in Santiago, Chile
Digifinex
digifinex is a block chain Digital Asset Exchange registered in Seychelles, which mainly provides currency trading services of bitcoin, Ethereum, lightcoin and other digital assets for global users. According to non trumpet data, there are 103 platform trading pairs at present. Digifinex is founded by blockchain and digital asset enthusiasts, with core teams from Xunlei, Tencent and Internet. It is operated by digifnex limited, which is registered in Seychelles, and its current operation center is located in Singapore
ZB network is a global digital currency exchange. Currently, there are 168 platform trading pairs, which support OTC and spot trading. At present, it has obtained the exchange license of Thailand and Du, and has set up operation centers in Switzerland, Canada, the United States, Bangkok, Du and other places. ZB focuses on providing global customers with safe, convenient and compliant blockchain asset trading services
10, coin win international station
coin win is a global digital asset trading platform set up by Chinese state-owned enterprises in Hong Kong. It adopts bank level security technologies such as cold storage, SSL and multiple encryption to ensure the security and stability of virtual currency transactions. It mainly provides transaction services of digital assets such as ether currency and HSR for global users, and is subordinate to citicash Hong Kong Investment Limited. Currently, there are 51 platform trading pairs, which support OTC and spot trading
bitcoin does not rely on specific currency institutions to issue. It is generated through a large number of calculations of specific algorithms. Bitcoin economy uses a distributed database composed of many nodes in the whole P2P network to confirm and record all transactions. The decentralized nature and algorithm of P2P can ensure that it is impossible to artificially manipulate the value of bitcoin through mass proction
bitcoin is very similar to cash
the advantages of bitcoin are: no freezing, no tracking, no taxes, and extremely low transaction costs. Compared with people who speculate in currency, it is wealth, and people outside the currency circle may think it is a fraud
bitcoin, Ethereum, bitcash, EOS, REBO, etc. are the mainstream digital currencies, which can be properly invested. All transactions have risks. You can invest cautiously. You can search online for fire coin, coin security, OK, dobby trading platforms, etc. all of which can trade bitcoin. These are relatively large trading platforms, investing in mainstream digital currencies, and Don't invest in counterfeit money or air money.
Public chain, also known as "public chain", refers to the blockchain that anyone in the world can enter the system at any time to read data, send confirmatory transactions and compete for bookkeeping. The public chain is generally considered to be "completely decentralized", because no indivial or institution can control or tamper with the reading and writing of data in it. In terms of application, blockchain public chain mainly includes bitcoin, Ethereum, super ledger, most counterfeit currencies and smart contracts. The ancestor of blockchain public chain is bitcoin blockchain, which has the following characteristics:
1, open source code
upload the code to GitHub, and everyone can get complete blockchain data by downloading, Accept the test of the public
2, complete decentralization
anyone can become a node, each node is open, everyone can participate in the calculation of the blockchain, any node is not permanent, but phased, and any center is not mandatory for nodes. Anyone can read and send transactions, and transactions can be effectively confirmed on the blockchain. Anyone can participate in the consensus process. The consensus process determines whether a block can be added to the blockchain and the exact current state. Everyone can get financial reward from it, which is proportional to their contribution to the consensus process. These public chains are generally considered to be "completely decentralized"
3. Developing decentralized applications
through this public chain, developers can easily develop centralized applications. Public chain can protect the rights and interests of users from the influence of program developers
1. Litecoin is similar to bitcoin, which is also an encrypted digital currency, and its price has risen sharply recently. It is a P2P open source digital currency, which can be regarded as a branch of bitcoin. However, although lightcoin is based on bitcoin protocol, it does not require very high computing power. It can also be mined using ordinary computers. Lightcoin's algorithm comes from the algorithm designed by Dr Colin Percival for tarsnap secure online backup service (backup for Linux and other open source operating systems)
2. Namecoin
namecoin is also based on bitcoin, which is another branch of open source. Namecoin is a distributed DNS protocol -- generally speaking, it can transform the website name (such as ifeng. Com) that can be understood by human into the address that can be understood by machine. As its own DNS, this kind of currency can operate outside the normal Internet, so it can break away from the control of ICANN
the monetary value and domain name of namecoin are stored in the user's blockchain records, limiting the total number to 21 million
3. Peercoin
peercoin is a peer-to-peer variant of bitcoin, which can improve mining efficiency and security, and improve safeguard measures to avoid group mining. Now, group mining has been considered as a potential defect of bitcoin. According to the statistics of emerging currencies by coinmarketcap.com, peercoin currently ranks fourth in the market value of digital currencies
4. Primecoin
primecoin is a cryptocurrency similar to bitcoin, but it uses a completely independent mining algorithm. Bitcoin uses the hashcash algorithm, while prime coin uses the long Cunningham chains to create the value of money - a sequence of prime numbers named after mathematician AJC Cunningham
in the process of bitcoin mining, as the amount of money goes on, the difficulty will increase sharply. But prime is different. Every time a primecoin is mined, the mining difficulty will increase slightly, and the process is much more stable< 5. Feathercoin
based on the design of litecoin, released in April 2013, can adjust the mining difficulty more frequently than litecoin. Feathercoin will be updated frequently, adding new features and improvements to eliminate malicious mining behavior
6. Novacoin
another P2P digital cryptocurrency. Novacoin is different from most other currencies in that it integrates a protection mechanism in the currency core, which can identify illegal mining activities
the total number of novacoin is limited to 2 billion, which is considerable. If necessary, the total can be adjusted upward
7, infinitech
published in June 2013. A by-proct of litecain. According to the mining situation and the total amount of money, infinite money can frequently adjust the mining difficulty ratio< Megacoin was only released in the fourth quarter of 2013, imitating bitcoin in the early stage. The total number of megacoin is limited to 42 million, which can be mined like other virtual currencies. Its biggest selling point is brand publicity, which other digital currencies lack< It was released in 2013 and is still in its infancy. In the security part of quarkcoin, nine independent loops are deployed and six different algorithms are used.
taking bitcoin as an example, it does not have an entity form, but exists in a special account book. All bitcoin transactions are recorded in the ledger. Through the transaction records, we can calculate the number of bitcoins owned by each user. If a person owns bitcoin, it means that he can find the relevant transaction records in the ledger
the ledger mentioned here is a software that we can download from bitcoin's official website, and the underlying technology used in this software is blockchain. In order to facilitate understanding, we usually say that blockchain is the ledger
the reason why blockchain is used as the underlying technology of ledger is to realize the feature of digital currency decentralization. It can be said that the starting point of a series of problems and solutions of digital currency comes from decentralization
2. Blockchain is a technology to ensure the safe use of digital currency. As we all know, blockchain technology has the characteristics of encryption and non tampering, which can rece the probability of errors in the use of digital currency to 0. Because digital currency requires higher encryption, it must be supported by blockchain technology. At present, not only many instries in China are using blockchain technology, but also many foreign countries are actively using blockchain technology.