Will digital currency wallet increase money
Nowadays, with the development of the Internet age, the era of digital currency is coming. Digital currency obviously provides convenience for people's life, and there are many advantages. However, digital currency has no advantages of real currency and no interest{ RRRRR}
Third, digital currency has no interestbut the promotion of digital currency also has certain obstacles, for example, our payment platform today, and these mobile payment also need network, once the network problems, then even can not complete the payment. However, digital currency is different, not only does it need no network, but also will not be limited by time and space, and even does not need handling charges< it's just that digital currency has no interest of real currency, which is also the case that many people are reluctant to use digital currency
The digital currency wallet is the hardware wallet, which means that the private key of digital assets is stored in a single chip, isolated from the Internet, plug and play. Hardware wallet can't guarantee 100% security. For example, if a geek gets your hardware wallet and doesn't know your private key, it may be cracked by violence. It's just one of the safest storage methods compared to other storage methods
many block chain entrepreneurs at home and abroad are optimistic about the development of this field, so they begin to build more hardware wallets. In the case of the exchange being stolen a lot of money and the software wallet being stolen from time to time, many investors regard the hardware wallet as the last moat
extended information:
whether the hardware wallet is safe
the hardware wallet can not guarantee 100% security. For example, if a geek obtains your hardware wallet, it may be cracked violently even if it doesn't know your hardware wallet immediately. It's just one of the safest storage methods compared to other storage methods
of course, there are exceptions, such as you have unlimited brain power and never forget. It's better to save it anywhere than in your own mind
Recently, Huawei and tpcast jointly completed the instry's first cloud VR service verification under 5g experimental network, realizing real-time cloud rendering of interactive CG (computer graphics) VR content, which is a revolutionary progress in the history of VR instry
from last year to this year, Huawei cloud seems to have sprung up. We can always see Huawei cloud's achievements in the media
according to the data on Huawei's official cloud website, Huawei released its cloud strategy in 2010, and then officially released its cloud operating system fusionsphere after three years, and there has been no substantial progress in the next four years. It was not until Xu Zhijun, vice chairman and CEO of Huawei, announced the establishment of cloud Bu ring the Huawei China ecological partnership conference in March 2017 that Huawei began to make full use of cloud computing and achieved rapid development
it can be said that Huawei cloud really started in 2017, which is quite late in the highly competitive cloud computing market, but the rapid progress of Huawei cloud is obvious to all, isn't it surprising for many people
coincides with the critical period of instry upgrading
public cloud has been developing for ten years in the world, and the first batch of customers are mainly Internet enterprises. In this generation of public cloud, Amazon, Microsoft and Alibaba have obvious advantages. But at present, two changes have taken place in the market: first, more customers of traditional enterprises or government agencies begin to migrate to the cloud, transforming the traditional architecture with cloud computing, big data and artificial intelligence technologies, and enjoying the dividends of these new technologies. Second, the last generation of public cloud has been developing for ten years, and the technology and architecture are facing upgrading. Especially with the help of a new round of artificial intelligence tide, it is the general trend for enterprises to go to the cloud, and creating cloud ecology has become the top-level construction goal of the cloud instry
It has such instry-leading data processing capabilities, but it does not touch data, which includes three sentences: the first sentence: Huawei does not use technical means to obtain customer data in the background, and recognizes the data sovereignty of the enterprise; The second sentence: Huawei does not commercialize customers' data and will never force enterprises to exchange data with Huawei; The third sentence: Huawei will open up its cloud and big data capabilities to help enterprises process data and give full play to the value of dataas we all know, the data on the public cloud is the most sensitive topic in the whole instry. Huawei has been emphasizing "don't touch data" since its first day. Under the guidance of this strategic idea, Huawei has won the trust of a large number of partners in a short time. By the end of 2017, Huawei cloud had nearly 2000 ecological partners. With the help of so many partners, it is impossible for Huawei cloud to be strong
"action group" corporate culture
people who know Huawei all know that this company is a typical "action group": if you don't do what you want to do, you have to do it, do it with all your strength, do the best, and do it to an incomparable degree. This is true of Huawei's enterprise business and Huawei's consumer business, which have continued to rise in recent years. Now it's Huawei's turn to cloud business
in any instry, it is the doers who really decide the direction of the instry, which is exactly where Huawei's culture lies. Huawei cloud Bu has been formally established for just one year, which not only shows its strength and sincerity to the instry, but also shows its low-key, pragmatic and honest attitude
on December 17, 2017, Huawei cloud and Tuowei Information System Co., Ltd. established cooperation to build nine public cloud instry solutions for the government and enterprises based on Huawei cloud; On January 27, 2018, Huawei cloud and UFIDA cloud jointly released four general enterprise services: Marketing cloud, collaboration cloud, tax cloud and U8 cloud; In February 2018, Huawei cloud officially released the deep learning service and blockchain service BCS; On March 15, 2018, Huawei cloud announced the opening of a Hong Kong data center to help enterprises reach the world and innovate in the future
the data shows that the number of Huawei cloud services has increased from 45 in 10 categories at the end of 2016 to more than 100 in 14 categories at present, including more than 60 solutions such as manufacturing, healthcare, EI enterprise intelligence, e-commerce, sap, HPC high performance computing, IOT, etc. Since the establishment of cloud Bu, the number of users and resource usage of Huawei cloud have increased three times
according to the market report from IDC, Huawei's cloud government cloud solutions are among the leading manufacturers in China's Government cloud market; Fusioncloud's private cloud solution ranks first in China
American Stock Research Society points out: different styles of strategies have different requirements for back testing, such as multi factor stock selection or trend strategy. The following points should be noted:
1. Distinguish the data in the sample from the data out of the sample, which is very similar to machine learning. The data in the sample is used for training, and the data out of the sample is used for verification the purpose of this is to avoid the over fitting trap
2. Income distribution: look at the income distribution of all transactions after your back test, and see whether your income source is a few times of large income or a few times of small income if it comes from a large return, your return will fluctuate greatly, and the firm offer will often fail to achieve your effect
3 if you have a parameter that is too sensitive to adjust, it will have a great impact on the revenue, and the situation of your real offer and the simulated offer are also likely to be different
strictly speaking, this kind of strategy avoids some common pitfalls, and it is relatively easy to achieve back testing and real offer
JD quantitative has recently launched some technical indicators of tongdaxin, which are not bad. You can go and have a look, and you should learn a lot< br />
1. Security risk of running environment
the core file of encrypted digital currency Wallet - private key / mnemonics is stored on the terminal device, whether it is PC or mobile terminal, if the terminal device appears unsafe phenomenon, it has a very high security risk for private key / mnemonics
at the beginning of design, a secure digital wallet can avoid the possibility of private key / mnemonics being stolen e to the running environment. The security problems of the running environment on the terminal mainly include virus software, operating system vulnerabilities and hardware vulnerabilities
2. The security risk of network transmission
the security of network transmission is more reflected in the ability to resist man in the middle attack. Man in the middle attack means that the attacker creates independent contact with both ends of the communication and exchanges the data they receive, so that both ends of the communication think that they are talking directly with each other through a private connection, but in fact the whole conversation is completely controlled by the attacker
although most digital wallet applications use the HTTPS protocol to communicate with the server, the man in the middle attack method is to get the content of the HTTPS protocol by installing a digital certificate in the user terminal
a secure digital wallet needs to be able to scan the legality of all the digital certificates in the terminal, check the proxy settings in the network transmission process, and ensure the security of the basic network communication environment
in the development of digital wallet, whether to use two-way verification for communication verification at the network transmission level is also an important criterion to measure the security of a digital wallet application
3. The security risk of file storage mode
for the private key / mnemonics of digital wallet, the storage mode of terminal device also needs to be paid attention to in the security design. The access right of private key / mnemonic file directory, the form of private key / mnemonic file storage and the design of encryption algorithm all need to be strictly designed
when we analyze the security of several mainstream digital wallets, we find that even the well-known digital wallets are random in the storage of private key / mnemonic words. There are both plaintext storage and encrypted storage, but the decryption key is fixed in the code, which can not play any role in security defense
4. The security risk of the application itself
the security risk of the application itself mainly focuses on the security defense of the application installation package itself
whether the application installation package has the ability of anti tampering is a very core technical ability. In addition, memory security, anti debugging ability, life cycle management of private key / mnemonics, security of debugging log and security of development process also need to be enhanced
5. Security risk of data backup
if the mobile application can be backed up, it can use the machine with more powerful computing performance to brutally crack the private key / mnemonics. For example, if android:allowBackup Property is set to allow backup, then the backup mechanism of the system can be used to back up the application data files, and the private key / mnemonics of the encrypted digital currency will be backed up to the external media, which breaks the security boundary design of the operating system from another direction
for the majority of users, the security of digital wallet also means the security of wealth, so we must be careful when choosing digital wallet.