Dahua blockchain

1. blockchain world is proced by Jingtong technology< Make complaints about br / > block chain

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< Introction to cognition & gt

publication time: 2016

recommendation: this book is mainly for programmers. Combined with API programming, we can tell you the principle and usage of cryptocurrency, as well as how to develop related software. For non programmer readers, the first few chapters of this book are still applicable as in-depth introction of bitcoin Book pdf download: https://quant.la/Download

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Dahua blockchain is a book published by Tsinghua University Press in September 2019, written by Zhang Yingping. This book is a blockchain book that comprehensively explains bitcoin, Ethereum, super ledger and EOS, a blockchain development guide from engineer basic skills, development language to smart contract development, and a blockchain engineer guide from technology, project to career development planning

"Dahua blockchain"

"Dahua blockchain" is a blockchain book that pays equal attention to theory and practice, easy to understand and professional. The blockchain technology guide (the first three chapters) mainly explains the concept of blockchain, blockchain applications, bitcoin, Ethereum, super ledger, EOS and other mainstream blockchain technologies. Through learning, each reader can fully understand the implementation principles of mainstream blockchain technologies and understand the future development trend of blockchain. The practical part of development (the last two chapters) starts from the basic skills of blockchain, simulates the development of real blockchain projects, and explains in detail the design, development and deployment of smart contract and DAPP. Through learning, every reader can master the development of blockchain

4. Generally speaking, leeks are cut in the stock market, which symbolizes that investors are cut one after another. This is also true in the digital money market
a banker is a large investor who can influence the financial securities market. It usually accounts for more than 50% of the circulation. Sometimes the amount controlled by the makers may not reach 50%. It depends on the varieties. Generally, 10% to 30% of the circulation can be controlled. A banker can influence or even control the stock price of a stock in the secondary market. Banker and retail investor is a relative concept. The same is true of digital money markets
generally, the digital currencies with makers are private blockchain projects, and Xiaosan has no money in hand. Bitcoin, wikilink, Ethereum and other mainstream currencies are relatively scattered, and it is difficult for the makers to control the market absolutely.

5. The possible problems of virtual currency are as follows:
1. The existence of pyramid selling currency and air currency
2. Forget the secret key of wallet and never find back bcbot
3. Too many leeks
4. Money laundering
5. Jiuzhuang

6. Bitcoin is a "digital currency" based on blockchain technology. In 2013, the central bank made it clear that bitcoin, as a specific virtual commodity, does not have the same legal status as currency and cannot and should not be used as currency in the market. The reason why bitcoin has become the "accomplice" of hackers this time lies in the characteristics of bitcoin: anonymity and difficulty in supervision

compared with other ways, using bitcoin to remit money is much more "secret". Normal cross-border remittance will go through the examination of exchange control institutions at all levels, and the transaction records will be recorded by banks and other parties. Transactions exceeding a certain amount should be reported to relevant departments to prevent money laundering and other violations. Bitcoin, with the characteristics of globalization, is usually used as a tool for cross-border payment and remittance. As a kind of network encryption virtual currency, bitcoin has the characteristics of decentralization and anonymity,
capital flow is not easy to track, and it is easier to hide identity
wannacry blackmail virus prevention method:
1. Install the latest security patch for the computer. Microsoft has released patch ms17-010 to fix the system vulnerability of "eternal blue" attack. Please install this security patch as soon as possible; For Windows XP, 2003 and other machines that Microsoft no longer provides security updates, we can use 360 "NSA Arsenal immunity tool" to detect whether there are vulnerabilities in the system, and close the ports affected by the vulnerabilities, so as to avoid being infringed by blackmail software and other viruses
2. Close ports 445, 135, 137, 138 and 139, and close network sharing
3. Strengthen the awareness of network security: don't click the unknown link, don't download the unknown file, don't open the unknown email...
4. Back up the important files in your computer to the mobile hard disk and U disk as soon as possible (regularly in the future), and save the disk offline after the backup
5. It is recommended that users who are still using Windows XP and windows 2003 should upgrade to Windows 7 / windows 10 or windows 2008 / 2012 / 2016 as soon as possible.