Blockchain bitcoin hash value
blockchain is a new computing paradigm and distributed infrastructure, which uses fast chain data structure, distributed node consensus algorithm, cryptography and intelligent contract based on automated script code to proce, verify, store and transmit data. It can also be said that blockchain is a distributed ledger technology, which can provide decentralized trust mechanism in non trust environment, so that multi-party participants can conct secure trust transactions without intermediaries
the application fields of blockchain include digital currency, token, finance, anti-counterfeiting traceability, privacy protection, supply chain, entertainment, etc. with the popularity of blockchain and bitcoin, many related top domain names have been registered, which has a great impact on the domain name instry.
hash algorithm is a cryptographic algorithm that can only encrypt, but not decrypt. It can convert any length of information into a fixed length string
this string has two characteristics:
1. Even if the input value changes only a little, the output hash value will be very different
2. Only exactly the same input value can get exactly the same output value
3. There is no rule between the input value and the output value, so the input value cannot be calculated by the output value. In order to find the specified output value, we can only use enumeration method: constantly change the input value to find the output value that meets the conditions
hash algorithm ensures that the results of bitcoin mining can not be deced reversely. Therefore, the miner's continuous operation is essentially brutally cracking the correct input value. Whoever finds the first one will get the bitcoin reward.
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/btcIn today's era of high development of the Internet, we are using the Internet more and more frequently, which has become an indispensable and important tool in our life. In particular, the mobile phone used for Internet communication has been used as a medium. In today's era, we are using mobile payment more and more, There are more and more ways to move. So what is digital currency? What do you know about it{ But generally speaking, it is a form of money< p> Finally, for such a form of transaction, it's all for the convenience of our daily life, and it's also for serving our own broad masses of people, so we don't have to worry about the advantages and disadvantages of digital currency and mobile payment
blockchain technology originates from bitcoin, and its essence is to create a decentralized digital currency system by using computer algorithm and cryptography technology, so as to realize the functions of currency issuance and transaction
characteristics of blockchain Technology:
1. Decentralized: there is no centralized hardware or management organization in the whole network, the rights and obligations of any node are equal, and the damage or loss of any node will not affect the operation of the whole system. Therefore, it can also be considered that the blockchain system has excellent robustness
2. Trustworthiness: there is no need to trust each other when participating in the data exchange between each node in the whole system. The operation rules of the whole system are open and transparent, and all data contents are also open. Therefore, in the specified rule range and time range of the system, nodes can not and cannot cheat other nodes
3. Collective maintenance: data blocks in the system are jointly maintained by all nodes with maintenance function in the whole system, and these nodes with maintenance function can be participated by anyone
4. Reliable database: the whole system will enable each participating node to obtain a of the complete database in the form of sub databases. Unless more than 51% of the nodes in the whole system can be controlled at the same time, the modification of the database on a single node is invalid, and the data content on other nodes cannot be affected. Therefore, the more nodes and computing power in the system, the higher the data security in the system
the other two features are derived from the four features:
5. Open source: because the operation rules of the whole system must be open and transparent, the whole system must be open source for the program
6. Anonymity: since there is no need to trust each other between nodes, there is no need to disclose the identity between nodes, and each participating node in the system is anonymous< EGD: e-gold coin, or EGD for short, is a network encrypted digital asset based on peer-to-peer Internet open source protocol, which circulates in a decentralized network system. EGD, as a kind of consumer asset given by global commercial consumers from businesses, is used to replace the points issued by businesses in traditional commercial society, realizing the networking, integration and capitalization of global commercial points
EGD, namely network gold, is an encrypted digital asset based on decentralized digital encryption technology. EGD was born in January 2014. It was developed by a team of 17 technical experts from seven countries around the world, led by former Microsoft engineers. EGD introces the technology of encrypted digital assets into the field of global business integration points, which enables global consumers to continuously share the profits of commercial society through the circulation and value-added of EGD business points, and create a win-win economic model for businesses and consumers
features of customized EGD:
with customized technology, we can easily build all kinds of intelligent assets based on EGD protocol, including stocks, bonds, or various derivative points
more importantly, customization technology not only expands the application scope of EGD, but also retains the characteristics of clear property rights and decentralization of EGD. Moreover, e to the limited number of customized points, customized points are more scarce.
there are about three kinds of currency in currency speculation. one is the base currency, which is similar to the representative of money. CNY and usdt Basic goods with value). One is the mainstream token, BTC, ETH (because of the national restrictions, the exchange can only trade in token, that is, take one kind of virtual currency to buy another kind of virtual currency, I don't know why.) The other is a variety of virtual currencies (commodities)
the purchase process is to first go to the exchange platform to find a personal seller with RMB to exchange for usdt, In the process of using usdt to exchange for the mainstream token BTC or eth used in purchasing various virtual coins, and finally using eth to purchase various virtual coins
A. base currency: CNY, usdt (exchangeable, need to be exchanged in good faith transactions with indivial buyers) B. mainstream token: BTC, ethc, virtual currency: all kinds of money, such as profit, need to be exchanged into usdt again, and then sold into CNY. Learn more about the coin circle
< blockquote >sharing area network ~ learn more about the coin circle
< / blockquote >experience: 1. Buy mainstream currency if you can't buy it. 2. If the new currency is not fried in January, it may become a banker to harvest leeks. 3. Just learned an experience, chasing up and killing down, meaning up do not buy, buy must be cut leeks If you have strength and value, you can hold it and wait for salted fish to turn over. 5. If the company is strong, the team is strong, and the executives are strong, you can pay more attention to it. Note: I don't understand the K line at all, and I don't understand the professional words, so I can only make a tentative decision on these purchase principles based on logical thinking
Terminology in the field of information technology. In essence, it is a shared database. The data or information stored in it is characterized by "unforgeability", "trace in the whole process", "traceability", "openness and transparency" and "collective maintenance". Based on these characteristics, blockchain technology has laid a solid "trust" foundation, created a reliable "cooperation" mechanism, and has broad application prospects
blockchain originated from bitcoin. On November 1, 2008, a person who called himself Zhongben Cong published the article "bitcoin: a peer-to-peer e-cash system", which describes the framework concept of e-cash system based on P2P network technology, encryption technology, timestamp technology, blockchain technology, etc., which marks the birth of bitcoin
in recent years, the world's attitude towards bitcoin has gone up and down, but as one of the underlying technologies of bitcoin, blockchain technology has been paid more and more attention. In the process of bitcoin formation, blocks are storage units that record all the communication information of each block node in a certain period of time
each block is linked by random hash (also known as hash algorithm), and the latter block contains the hash value of the former block. With the expansion of information exchange, one block is connected with another block one after another, and the result is called blockchain
extended materials:
from the perspective of science and technology, blockchain involves many scientific and technological issues such as mathematics, cryptography, Internet and computer programming. From the perspective of application, in short, blockchain is a distributed shared ledger and database, which is decentralized, tamper proof, traceable, collective maintenance, open and transparent
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, which is essentially a decentralized database, as well as the underlying technology of bitcoin
in fact, the word blockchain does not appear in the original English version of bitcoin white paper, but the word chain of blocks. In the earliest Chinese translation of bitcoin white paper, chain of blocks was translated into blockchain. This is the earliest time when the Chinese word "blockchain" appeared