Ethereum of noumenon

1.

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

2.

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

3. Digital currency is a kind of legal tender, which must be issued by the central bank. Both digital gold coin and cryptocurrency belong to digital currency, which is not a network virtual currency, because it is not limited to virtual space, but is often used for real goods and services transactions, such as bitcoin, Wright coin, bitstock, etc. at present, there are thousands of digital currencies issued around the world

the digital currency launched by the central bank is a national sovereign currency, which is based on the digitalization of RMB. This is a piece of data generated by a complex algorithm, which contains blockchain and encryption technology, making it unique. The payment of Alipay and WeChat is not digital money, but only based on the payment realized by electronic accounts. Compared with the current pattern of "payment transfer collection" with the help of third-party payment, what digital currency needs to achieve is "decentralization", that is, to cancel the transfer link and directly hand over the money from the payer's account to the payee, so as to rece the payment cost in currency circulation

types of digital currency

according to different issuing or consensus mechanisms, it can be divided into four categories:

1, proof of work (POW)

proof of work. The system rewards are obtained through the mining of computing power to complete the issuance and distribution of currency. More work, more gain. Such as bitcoin, lightcoin (LTC)
the advantage is that the mining cost can form a monetary price support to a certain extent, and the disadvantage is that energy consumption and environmental protection are criticized< 2. Proof of stake (POS). Allocate the newly generated currency or interest according to the amount and time of cryptocurrency you hold. Such as dash and Neo
compared with pow, POS is more energy-saving, but it increases the security risk

3. The evolution scheme of delegated proof of stake (dpos)
POS. Similar to the voting mechanism of the board of directors, through the election of representatives to vote and make decisions, n accounting nodes are elected to create, verify, sign and supervise each other. Such as the grapefruit coin (EOS)
the advantage is high efficiency, but the problem is that it presents a semi centralized state

4. POW + POS hybrid mechanism
POW is mainly used to issue currency, and POS is used to maintain the system. For example, PPC

according to the project type, it can also be divided into four categories:

1. Currency category
digital currency issued for the purpose of transfer, payment and value storage. For example, bitcoin, bitcoin cash (BCH), Monroe (XmR), and grin

2. Public chain currency, that is, the digital currency issued by public chain projects, is generally the "fuel" for the application projects to run on the public chain. Such as eth, grapefruit coin, TRX and ont

3. Application token, that is, digital currency issued by decentralized application projects, is equivalent to equity or points. For example, OMG (payment application), GXC (data application), 1st (game application)

4. Platform currency, that is, the digital currency issued by the digital currency exchange, is equivalent to equity, points or fuel. For example, BNB, HT and okb.

4. Xiaoyi blockchain, laikelib and many others seem to be very successful.

5. 1. RSK bitcoin side chain, more intelligent bitcoin
2. Dfinity self evolution "infinite chain" computing, Ethereum competitors
3. Ont ontology network, Fosun Group ten million yuan level
4. Oracle of BLZ blockchain ecosystem
5. Go net work Ethereum network mobile infrastructure
6. Orchid protocol bypasses firewall and communicates freely
7 Lightning network on Trinity ant
8, wtss smart wallet
9, zilliqa
10, rchain
11, Cybex's decentralized trading platform based on EOS
12, early investment in investdigital coin capital
13, IHT cloud coin, entrepreneurial team from Morgan, IBM, Deloitte, Internet Microsoft
14, theta streaming media infrastructure, American version of traffic ore
15, realchain high-end consumer goods and collectibles identification data center
the key is to keep faith[ [coin an community]

6. Spiderstore spider store is a DAPP distribution platform and chain game sharing community, which synchronizes the DAPP rankings of major public chains in the world in real time. All the applications and games included in spiderstore website are pure blockchain games. At present, it covers DAPP and blockchain games on Ethereum eth, grapefruit EOS, wave field Tron, ontology ont, steem and other public chains. The number of blockchain games is constantly updated every day. We provide app, PC website, and wechat applet, so that users can easily play DAPP in any scene.

7. Godapp can learn about it

8. Make the headlines. Blockchain has been developing for some time. Now bitcoin, which is closely related to blockchain, is also very popular. It's worth more than 10000 US dollars. Therefore, many people begin to want to invest in speculation. But bitcoin is still very difficult to understand. We need to read more professional articles to better understand it.