Digital currency privacy

1.

The digital currency of the central bank is DCEP

the name of the digital currency developed by the central bank is DCEP (digital currency electronic payment). DC is digital currency. EP is electronic payment. Payment transmits digital things through a certain way, not paper currency. Therefore, electronic payment itself has the attribute of digital currency

The characteristics of digital currency are: low transaction cost; Fast trading speed; Highly anonymous

extended data

Application of digital currency

I. fast, economic and safe payment and settlement

cross border payment helps RMB internationalization. In 2015, the settlement volume of cross-border payment involving current account is about 8 trillion yuan. To accelerate the internationalization of RMB, cross-border payment and settlement procts and solutions with low cost, high efficiency and low risk are needed

At present, there are still a lot of repetitive human work in the bank's electronic loan process and processing process, and as the basic support of loan issuance, many of the collateral has the situation of false pricing or multiple or even no collateral. We can consider using digital currency to price and track bank collateral:

3. Bill finance and supply chain finance

in recent years, various bill market businesses based on commercial bills have grown rapidly, and bill financing procts have become a hot area of Internet financing. However, about 70% of the current bill businesses in China are still paper transactions, Supply chain finance is also highly dependent on labor costs

reference materials

network digital currency

2. The anonymity of digital currency market is still there, which is also very popular. Although bitcoin has anonymity, its anonymity is not particularly good. Zcash is similar to bitcoin in many ways. First of all, it is also based on the distributed ledger (blockchain) for transactions. But there is one big difference between zcash and bitcoin: zcash is completely anonymous
according to the introction, zcash uses a technology called zero knowledge proof (known as "ZK snark") to verify the authenticity of the transaction. It uses a public blockchain to display the transaction, but it will hide the amount of the transaction. Viewing the owner of the key (i.e. the owner of the coin) allows others to view the information associated with the key
in short, this method of calculation allows users to prove that they have the currency they want without exposing information about where the currency came from or is going. It's like zero knowledge proof allows you to enter a password on a website and verify it by the website's server without actually transmitting the password
in contrast, although bitcoin and other digital currencies are famous for their concealment of transactions, in real life, they can often track transactions through the records of ordinary bitcoin blockchain, so that people can accurately know the sender and sending location of bitcoin. Nowadays, zcash has realized the transaction of original data in the form of encryption, rather than publishing the transaction data to the public like bitcoin. Snowden also said that the anonymous zcash project can solve the monitoring risk of bitcoin
therefore, zcash, an anonymous function that pursues the ultimate privacy protection, is first considered to have great value in the financial instry. Foreign media pointed out that the traditional financial instry has an extraordinary demand for information protection. Although many people think that the privacy requirements of bitcoin and other blockchain systems come from crypto anarchists and liberals, the fact is that the traditional financial instry is promoting the hiding of transaction information on the blockchain
however, the anonymity of digital currency is also a headache for the regulatory authorities, and it is very difficult to popularize it in the world. At most, it is only a niche proct. However, the platform developed by using blockchain technology has great potential. For example, the blockchain content publishing platform decent, Ethereum's intelligent contract and so on.

3. You can call 110 or go to the police station nearby
the police will protect your privacy
if you are cheated, you must call the police immediately. So you can recover your losses.

4. As a blockchain digital currency practitioner, to answer "first of all, you need to understand how bitcoin comes from. I hope the following answers will help you
what is blockchain
blockchain is a technical solution to maintain a reliable database collectively through centralization and distrust
generally speaking, blockchain technology refers to a way for the whole people to participate in bookkeeping. There is a database behind all the systems. You can think of the database as a big ledger. So it's very important who keeps this account book
so what's the difference between our current accounting method and blockchain
take the Internet giant companies as an example, wechat's account book is Tencent's account book, and Taobao's account book is Alibaba's account book
but in the blockchain system, everyone in the system can have the opportunity to participate in bookkeeping. If there is any data change in a certain period of time, everyone in the system can conct bookkeeping. The system will judge the person who has the fastest and best bookkeeping in this period, write the content of his records into the account book, and send the content of the account book to all other people in the system for backup. In this way, everyone in the system has a complete account book. This way, we call it blockchain technology
will not mastering blockchain be eliminated by the times
although blockchain is popular, for ordinary people, they don't need to panic and can't master this technology. In fact, it has nothing to do with us. After the implementation of blockchain development, we only need to be able to use related applications. Just like we don't need to know what is the underlying TCP / IP protocol of the Internet, we just need to enjoy the services provided by the Internet. Blockchain is more similar to the underlying technology such as TCP / IP, and will be extended to more and more instries in the future
how to apply blockchain
the most important thing of blockchain is to solve the problem of intermediary credit. In the past, it was difficult for two people who didn't know and trust each other to reach cooperation, and they had to rely on a third party. For example, in the past, there must be an institution such as a bank or Alipay.
therefore, blockchain can subvert many instries, making these instries without intermediary participation, efficient and transparent process, low cost and high data security. Therefore, if there is any demand in these three aspects, the instry will have the opportunity to use blockchain technology
what is bitcoin? Is bitcoin a blockchain
blockchain technology is the underlying technology of bitcoin. Through the blockchain technology, bitcoin is the first time for human beings to realize the mutual trust transfer behavior without the participation of any intermediary. And this system has been running autonomously and stably for many years, and there has been no problem
therefore, many people have noticed that the underlying technology may have a great mechanism, and it can be used not only in bitcoin, but also in many fields. Therefore, bitcoin technology is abstracted, which is called blockchain technology or distributed ledger technology. So from a certain point of view, bitcoin can be regarded as the first application of blockchain, and blockchain is more similar to the underlying technology such as TCP / IP, which will be extended to more and more instries in the future
what is "mining"
mining, in a narrow sense, is the "mining" in bitcoin. The operation of bitcoin adopts a mechanism called "proof of work (POW)". In order to find out who has more powerful computing power, the system will work out a mathematical problem every time. Only the computer that can solve the problem the fastest can carry out accounting. The computer that grabs the bookkeeping right will be rewarded with 25 bitcoins. This behavior is usually called "mining", and the bitcoin obtained is regarded as the reward for successful mining
broadly speaking, it is a process of bookkeeping reward, which can be used in any instry or digital currency
what is smart contract
smart contract is a kind of contract that uses computer language instead of legal language to record terms. Smart contracts can be executed automatically by a computing system. If blockchain is a database, smart contract is the application layer that can make blockchain technology applied to reality. In the traditional sense, the contract has no direct connection with the computer code to execute the content of the contract. In most cases, paper contracts are filed, while software executes contract terms written in computer code. The potential benefits of smart contracts include lower contract signing, enforcement and regulatory costs; Therefore, for many contracts related to low value transactions, this is a great rection in labor costs
Q: how to use smart contracts
if the central bank can issue legal currency through blockchain, it can also embed code into the behavior of issuing legal currency through smart contract technology, and this part of legal currency can be called "programmable currency". For example, if the Central Bank specifies that a certain part of the fund is issued to the agriculture related account, then it can write the corresponding proceres for this part of the fund, and specify that this part of the fund can only enter the agriculture related account, then this part of the fund can not be misappropriated to other accounts under any circumstances. If most currencies become "programmable currencies", then we can imagine that the financial environment they form will become "programmable finance"
what is digital currency
digital currency refers to the digitization of currency. Digital currency can be divided into two types: non cryptocurrency (e-gold, XRP) and cryptocurrency (bitcoin)
digital currency is often mistaken for virtual currency. But virtual currency refers to non real currency. For example, when you play "Three Kingdoms" (game) or "grand Voyage", you have money, and that money is virtual. Of course, the virtual money will also have its real value. For example, if you buy her / his account from another player, you can get all the virtual assets of that player, and then it will be much easier for you to continue playing
does a blockchain project need to have some kind of currency
A: No. Bitcoin itself is a payment system, so it needs a value measurement tool, so bitcoin must appear. In addition, in order to reward more people who are willing to contribute their computers to provide computing for the system, bitcoin is needed. In some private chain systems, special assets can be designed for transaction, and each node must participate

5. How much is this kind of video card miner? I think it can cost three or five hundred yuan a day, because this kind of work is hard.

6. The answer is of course not. What the blockchain system needs to preserve is also targeted

7. At present, there are many problems in the application of digital currency, such as the confidentiality of transaction data, privacy and privilege mechanism, calculation and storage efficiency. Among them, operation security risk and privacy leakage risk are the basis of digital currency security. Therefore, it is necessary to study the construction of a new e-money security account model, the research on the key leakage tracking and revocation technology of distributed digital money account, and the research on the privacy and anonymity of e-money account, so as to establish a mechanism to ensure the security and privacy of digital money.

8. The significance is to rece the use of paper money, which can rece the waste of paper. At the same time, it makes people more convenient and fast, and will no longer be difficult because they forget to bring money.

9.

With the advent of digital currency, the encryption algorithm of currency is becoming more and more important. What are the types of passwords

classical cipher types mainly include transposition cipher and rearrangement of alphabetic order messages. For example, "Hello world" becomes "ehlol owrdl"

Diffie Hellman and RSA algorithms have been widely used except for the first public example of high quality public key algorithms. Other asymmetric key algorithms include Cramer schup cryptosystem, ElGamal encryption and various elliptic curve techniques

some well-known cryptosystems include RSA encryption, Schnorr Signature, El Gamal encryption, PGP and so on. More complex password systems include e-cash system, signcryption system, etc. Now more cryptosystems include interactive proof systems, such as zero knowledge proof, which is used for secret sharing

for a long time, information collection and law enforcement agencies have been interested in cryptography. The importance of secret communication is self-evident. Because cryptography promotes privacy protection, it also attracts great interest of cryptography supporters. Therefore, there is a history of controversial legal issues around cryptography, especially since the emergence of cheap computers makes it possible to widely use high-quality cryptography

nowadays, cryptocurrency transactions are semi anonymous, which makes them very suitable for a series of illegal activities, such as money laundering and tax evasion. However, the proponents of cryptocurrency often attach great importance to the anonymity of digital currency and think that it can protect the privacy of users. Some cryptocurrencies are more private than others

Cryptocurrency is a new type of digital asset, which is based on the network distributed on a large number of computers. This decentralized structure enables them to exist outside the control of the government and central authorities. The term "cryptocurrency" also comes from the encryption technology used to protect the network

blockchain is an organization method to ensure the integrity of digital currency transaction data, and it is an important part of many cryptocurrencies. Many experts believe that blockchain and related technologies will subvert many instries, including finance and law. Cryptocurrencies have been criticized for many reasons, including their use for illegal activities, exchange rate fluctuations and the vulnerability of the infrastructure that underpins them. However, digital currency is also praised for its portability, divisibility, anti inflation and transparency