Btc123 shangweibo
I believe that the law will never let a bad man go.
Yes. Click buy on the bitcoin trading website and choose PayPal when it comes to the payment method. Now PayPal supports bitcoin trading
purchase process:
1. The first step is to enter China's bitcoin trading platform and register
2. The second step is to register successfully. After login, you can buy and sell bitcoin. Under the transaction function, you can buy and sell bitcoin, manage the entrustment and query the transaction operation. Under the account management, you can transfer in and out bitcoin and transfer in and out RMB
The third step, RMB recharge and cash withdrawal support a variety of ways, the handling charge is relatively high, and the limit and handling charge of each way are different 
4. The transfer in and transfer out of bitcoin refers to the transfer of bitcoin between the trading platform and the bitcoin wallet. The bitcoin wallet needs to be downloaded from the bitcoin official website. After downloading and installing, it needs to synchronize the data. The current data packet is about 8.5g, which takes a long time to synchronize. For friends with a small amount of investment, it can be skipped
5. After the installation of bitcoin wallet, there will be a default acceptance address. When the transaction platform withdraws bitcoin, you can paste the address. Recharge is a reverse operation. The transaction platform will give you an address to send money in the wallet and paste the address
the transaction of bitcoin needs to pay a certain handling fee. The handling fee of bitcoin China is 0.3%, which is equivalent to the upper limit of the Commission for stock transaction. In the trading platform, there is the latest trading data, also can refer to btc123, the market data is more intuitive. Bitcoin trading is different from securities trading. There is no limit to the rise and fall of bitcoin, and it trades 24 hours a day. The whole market plate is small, and it is easy to be controlled by the makers, and it may also be attacked by hackers. Therefore, the risk is huge. It is recommended to invest cautiously. Novices had better understand the relevant concepts first
1 China bitcoin trading platform, after entering the website, register
2, after successful registration, you can buy and sell bitcoin. Under the trading function, you can buy and sell bitcoin, manage the entrustment and query the trading operation. Under the account management, you can transfer in and out bitcoin, Transfer in and transfer out of RMB
3 RMB recharge and withdrawal support a variety of ways, and the handling charge is relatively high, and the limits and handling charges of various ways are different
4 the transfer in and transfer out of bitcoin refers to the transfer of bitcoin between the trading platform and the bitcoin wallet. The bitcoin wallet needs to be downloaded from the bitcoin official website, and the data needs to be synchronized after downloading and installing, The current packet size is about 8.5g, which takes a long time to synchronize. For friends with small investment, you can skip it. After the installation of bitcoin wallet, there will be a default acceptance address, which can be pasted when the trading platform withdraws bitcoin, while recharging is a reverse operation. The trading platform will give you an address
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the transaction of bitcoin needs to pay a certain handling fee. The transaction handling fee of bitcoin China is 0.3%, which is equivalent to the upper limit of the Commission of stock transaction. In the trading platform, there is the latest trading data, also can refer to btc123, the market data is more intuitive. Bitcoin trading is different from securities trading. There is no limit to the rise and fall of bitcoin, and it trades 24 hours a day. The whole market plate is small, and it is easy to be controlled by the makers, and it may also be attacked by hackers. Therefore, the risk is huge. It is recommended to invest cautiously. Novices had better understand the relevant concepts first If you don't want to put the website, please search by yourself]
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January 23, 2019 is the brand day of btc123 and the 8th anniversary of our founding. We are the earliest blockchain enterprise in China. As the first one-stop instrial service platform of blockchain established in China, btc123 customizes the overall blockchain solutions for many enterprise users with innovative support services such as equity investment, fast financing and proct promotion, Help business incubation; With the most comprehensive and accurate market data analysis in the instry, we provide information and data related to digital currency and blockchain for nearly 700 million users at home and abroad. Now we have covered many countries and regions such as the United States, Europe, Japan, South Korea and so on. Now we are living very well
Development process
Cryptography (in Western European languages, from Greek krypt) ó S "hidden", and gr á Writing is a subject that studies how to transmit information in secret. In modern times, especially the mathematical study of information and its transmission, it is often regarded as a branch of mathematics and computer science, and is also closely related to information theory
Ron Rivest, a famous cryptographer, explained: "cryptography is about how to communicate in the presence of enemies". From the perspective of engineering, this is equivalent to the similarities and differences between cryptography and pure mathematics. Cryptography is the core of information security and other related issues, such as authentication and access control. The primary purpose of cryptography is the meaning of hidden information, not the existence of hidden information
Cryptography also promotes computer science, especially the technologies used in computer and network security, such as access control and information confidentiality. Cryptography has been applied in daily life, including ATM chip card, computer user access password, e-commerce and so oncipher is an important means for communication parties to transform information according to the agreed rules. According to these rules, changing plaintext into ciphertext is called encryption transformation; Changing ciphertext into plaintext is called decryption transformation. In the early stage, cipher only added or decrypted words or numbers. With the development of communication technology, voice, image and data can be added or decrypted
Cryptography is graally developed in the practice of the struggle between coding and decoding, and with the application of advanced science and technology, it has become a comprehensive cutting-edge technology. It is closely related to linguistics, mathematics, electronics, acoustics, information theory, computer science and so on. Its practical research results, especially the cryptography and decoding methods currently used by governments all over the world, are highly confidentialthe rule of crypto transformation is called cryptosystem. The parameter indicating this transformation is called the key. They are an important part of cryptography
The basic types of cryptosystem can be divided into four types: disorderly according to the prescribed graphics and lines, changing the position of plaintext letters or numbers into ciphertext; Substitution -- one or more substitution tables are used to substitute plaintext letters or numbers for ciphertext; Cipher text: to change plaintext into ciphertext by using a pre-determined alphabetic or numeric cipher group instead of a certain phrase, word, etcscrambling-a series of sequences composed of finite elements are used as scrambling numbers, which are combined with plaintext sequences to form ciphertext according to the specified algorithm. The above four cryptosystems can be used alone or in combination to proce practical cryptosystems with high complexity
Since the 1970s, some scholars have proposed the public key system, which uses the mathematical principle of one-way function to realize the separation of encryption and decryption keys. The encryption key is public and the decryption key is confidential. This new cryptosystem has attracted the attention and discussion of cryptologyaccording to the rules of text and password, under certain conditions, various technical means are adopted to analyze the intercepted ciphertext, so as to obtain the plaintext and restore the cipher system, that is, to decipher the password. The requirements for decoding codes of different strength are different, even very different
In fact, secret letters were used in wars before BC. Herodotus, the father of western historiography, recorded some of the earliest secret letter stories in his history. In the 5th century BC, Greek city states had many conflicts and wars with Persia in order to fight against slavery and aggressionin 480 BC, Persia secretly assembled a powerful army to launch a surprise attack on Athens and Sparta
Demaratus, the Greek, saw the assembly in the city of Susa in Persia, covered the words on the board with a layer of wax, and sent it to the Greek to inform them of the plan of Persia. Finally, the Persian navy was lost in the Salamis Bay near Athenssince most people were illiterate in ancient times, the earliest form of secret writing only used paper and pen or equivalent items. With the improvement of literacy rate, real cryptography was needed. The two most classical encryption techniques are:
transposition cipher: rearrange the alphabetic order, such as' help me 'to' ehpl em '
substitution cipher: systematically changing a group of letters into other letters or symbols, such as' fly at once 'to' GMZ Bu podf '(each letter is replaced by the next letter)
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extended materials:
research
as the main discipline of information security, cryptography of Xi'an University of electronic science and technology ranks first in China
In 1959, under the instruction of Qian Xuesen, Xi'an University of Electronic Science and technology took the lead in carrying out cryptography research in China. In 1988, Xidian was the first to set up a master's program in cryptography, and in 1993, it was approved to set up a doctor's program in cryptography. It is one of the first two doctor's programs in cryptography in China and the only doctor's program outside the military, And become the national 211 key construction disciplinein 2001, information security specialty was established on the basis of cryptography, which is the first batch of universities in China to set up this specialty
the information security major of Xi'an University of Electronic Science and technology relies on the first-class national key discipline "information and Communication Engineering" (the second in China) and the second-class national key discipline "cryptography" (the first in China), which is the innovation platform of 985 project advantage discipline and the key construction discipline of 211 project
State Key Laboratory of integrated service network theory and key technology, National Engineering Laboratory of wireless network security technology, modern switching and network coding research center (Chinese University of Hong Kong - Xi'an University of Electronic Science and Technology), Key Laboratory of computer network and information security, Ministry of ecation The Key Laboratory of the Ministry of ecation and other national, provincial and ministerial scientific research platforms
among the 34 directors of the Chinese society of cryptography, 12 are from Xidian, and the two vice directors are graates of Xidian. The only member of China in the international society of cryptography is also from Xidian. It is no exaggeration to say that Xidian has become the core base for training cryptography and information security talents in China
the following is a brief list of Xi'an Xin'an graates: Lai Xuejia, member of international cryptographic society, designer of idea block cipher algorithm; Chen Lidong, research fellow of American Bureau of standards; Ding Cunsheng, Professor, Hong Kong University of science and technology; Xing Chaoping, NTU Professor, Singapore; Feng Dengguo, director of the National Laboratory of information security, Chinese Academy of Sciences, and vice president of the Chinese cryptographic society
Zhang Huanguo, executive director of China cryptographic society, Professor of Wuhan University and leader of Xin'an; He Dake, vice president of China cryptographic society, Professor of Southwest Jiaotong University and leader of Xin'an; He Liangsheng, chief cryptographer of PLA General Staff; Ye Jiqing, director of key management center of PLA
Xi'an University of Electronic Science and technology has three Chinese leaders in the field of information security: Xiao Guozhen, Wang Yumin and Wang Xinmei. Among them, Professor Xiao Guozhen is one of the main pioneers of modern cryptography in China. His concept of statistical independence of combinatorial functions and his spectral characterization theorem of correlation immunity of combinatorial functions are internationally known as Xiao Massey theorem
has become one of the basic tools of cryptography research, and opened up a new field of stream cryptography research. He is a member of the Executive Committee of the Asian cryptographic society, vice chairman of the Chinese cryptographic society, and a consultant to the editorial board of the International Journal of information security (ijis)
in 2001, WAPI, the mandatory standard for wireless network security formulated by Xi'an University of Electronic Science and technology, shocked the world. China owns the completely independent intellectual property rights of the technology, breaking the monopoly of IEEE in the world. The Wall Street Journal reported at that time that "China's Encryption Standard for wireless technology caused confusion in the instry."
this technology is also one of the few significant scientific and technological advances that China has made in the IT field with world influence
the information security major of Xi'an University of Electronic Science and technology ranked first in China for many years, which is the best reflection of its leading position in the national information security field
source: network cryptography
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这网站伺服器回你 http_code=521
Array ( [content_type] => text/html [http_code] => 521 [header_size] => 147 [request_size] => 218 [filetime] => -1 [ssl_verify_result] => 20 [redirect_count] => 0 [total_time] => 1 [namelookup_time] => 0 [connect_time] => 0.234 [pretransfer_time] => 0.75 [size_upload] => 0 [size_download] => 1067 [speed_download] => 1067 [speed_upload] => 0 [download_content_length] => -1 [upload_content_length] => 0 [starttransfer_time] => 1 [redirect_time] => 0 [certinfo] => Array ( ) [primary_ip] => 113.207.76.99 [primary_port] => 443 [local_ip] => 192.168.1.101 [local_port] => 61288 [redirect_url] => )
你可能要查SSL的certificate.