Block chain random number post block hash
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.
jinwowo group analyzes the functions of its hash algorithm as follows:
the hash value of the blockchain can uniquely and accurately identify a block. Any node in the blockchain obtains the hash value of the block through simple hash calculation, and the calculated hash value does not change, which means that the information in the blockchain has not been tampered with.
generally, y = hash (x) is used in the instry to calculate a hash value y by calculating X.
In 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
bitcoin is a kind of virtual currency, and its quantity is very scarce. We can invest by buying bitcoin or by buying the rise and fall of the last three digits of bitcoin this guy is Xiao Liu. He is still in school, and the school has winter vacation. After the holiday, he went home and would brush short videos at home when he was free. One day when he was writing a short video, he saw something about bitcoin investment and felt very excited
I think parents should ecate their children correctly. If children want to learn to invest, parents can teach them hand in hand and give them some small money to try water. When they lose money, they will find that investing is not as easy as they think. At this time, parents can give their children some books so that they can systematically learn to invest, or let them do their study well first. If their study reaches any ranking, they will give them appropriate investment again. Of course, they must let them learn to invest before this investment. And the money lost can be regarded as the tuition fees for children
Hash function, also known as hash function and hash algorithm, is a method to create small digital "fingerprint" (also known as Digest) from any kind of data. What do you mean? That is to say, if you input data of any length and content, the hash function outputs a fixed length and fixed format result, which is similar to the fingerprint of the data you input. As long as the input changes, the fingerprint will change. Different content, the fingerprint obtained by hash function is different. This is the hash function
in distributed ledger, in order to ensure data integrity, hash value is used for verification. For example, a transaction or a page of ledger (that is, the concept of block) generates a summary after hashing, which means that the transaction information of the whole block cannot be tampered with (that is, the summary cannot be kept unchanged after tampering with the data)
the original definition or narrow sense of blockchain is in the form of block + chain, which is linked by hash. Each block may have many transactions, and the whole block can generate summary information through hash function, and then each block needs to record the summary information of the previous block, so that all blocks can be connected into a chain
if you change the data of a block in the history, it means that the block summary value (i.e. hash value) will change, then the hash of the previous block recorded in the next block will have to be modified accordingly, and so on. That is to say, if you want to modify the history, you need to start from that point, and then all records will have to be modified to ensure the legitimacy of the ledger, Hash function increases the difficulty of account book tampering
the Xueshuo innovation blockchain Technology Workstation of Lianqiao ecation online is the only approved "blockchain Technology Specialty" pilot workstation of "smart learning workshop 2020 Xueshuo innovation workstation" launched by the school planning, construction and development center of the Ministry of ecation of China. Based on providing diversified growth paths for students, the professional station promotes the reform of the training mode of the combination of professional degree research, proction, learning and research, and constructs the applied and compound talent training system