Bitcoin sendfrom
It can't turn. These are proxy websites, where can I convert currency
according to the 2017 Credit Suisse report, the number of millionaires in the world is about 36 million. Therefore, if a "bitcoin club" composed of users with more than one bitcoin is established, the number of members of the club will not exceed 21 million, less than the number of global millionaires
bitcoin is graally released through the so-called "mining", and today it has issued more than 85% of the total. It's going to get slower and slower, and it's going to stop completely by about 2140. At present, bitcoin's annualized inflation rate (3.7%) is far lower than that of the US dollar since 2008 (36%), and it will further drop to 1.7% after half a day's rection next year
theoretically, one bitcoin can be infinitely subdivided by expanding the precision of digital storage or by upper layer expansion (such as lightning network technology). However, the transfer fee actually limits the value of bitcoin, which is too small. Therefore, the current code only supports subdivision to one in 100 million. The unit calls it "cong", which is named by netizens in memory of the inventor of bitcoin, Nakamoto. Don't say that one bitcoin is too expensive, because you can buy 0.1 or 0.01
bitcoin is in the address. Address is a number, but for the convenience of writing and using, it is encoded into a string form. The bitcoin address is generated by the private key of bitcoin through cryptographic calculation. This generation process does not need Networking (because mathematical calculation does not need Networking), and can be generated offline on your own computer
register
to register an account first is equivalent to opening an account in a bank. Click sign up in the upper right corner to register an account. Enter your email and password on the registration page to register successfully
then, click accept and continue to accept the agreement
The account you receive bitcoin is your own bitcoin wallet address. It's different because you have created multiple bitcoin addresses. You can send the bitcoin from the address where you receive bitcoin to your original bitcoin wallet address. Let's take coinbase as an example to illustrate how to use bitcoin Wallet:
< UL >register
register an account first, which is equivalent to opening an account in a bank. Click sign up in the upper right corner to register an account. Enter your email and password on the registration page to register successfully
then, click accept and continue to accept the agreement
receiving bitcoin
after successful registration, you can sign in for account operation. You can select create new address in account settings / bitcoin addresses to select the address of each collection. Click Details on the right side of the newly created account to modify the label to mark the purpose of the address, and save changes to confirm the modification, so that you can clearly know what a certain payment is for
note: the 32 characters in the address are the address of each transaction, which can be sent to the person who wants to transfer bitcoin to you. Or enter the address where you are going to transfer bitcoin to complete the transfer operation. The transfer process may take some time
< UL > send bitcoin
of course, you can also transfer out bitcoin through send money in send / request. Click send money to enter the destination address (32 strings) in the dialog box, and enter the number of bitcoins to be transferred in the amount BTC. Of course, you can also write some information in the message. Then click the send money button to complete the transfer operation
in the bitcoin network, each node with a client installed has a distributed database to manage bitcoin proction, transaction, query account balance records, and update and record the latest records of changes in the bitcoin system
when you want to send 10 bitcoins to your friends. You need two things, one is the bitcoin address, the other is the corresponding private key. Bitcoin addresses are different from bank accounts. You don't need to sign a bunch of documents to apply for them. They are randomly generated, just a string of letters and numbers. The private key is also a similar string, but this is strictly confidential. The bitcoin address is like a transparent piggy bank. Everyone can see what's in it, but only the person with the private key can open it.
after you send the transaction application, the surrounding nodes will check whether your account has 10 bitcoins. If there are, they will agree to the transaction, and broadcast the message to the nearby nodes, which will be transmitted from one to ten, and from ten to 100, Soon the whole network will confirm the transaction information and write it to the block. Your friend will receive 10 bitcoins, and the transaction will be completed.
if you want to send small bitcoins, in theory, digital currency can be cut infinitely. At present, the smallest bitcoin unit is called "Nakamoto Tsung", which is equivalent to 0.00000001 bitcoins.
Call the police. If you receive a similar e-mail, you can directly pull the sender into the blacklist, and report the e-mail, so that you will not receive such e-mail. In addition, if the e-mail box can, you can set a receiving rule, set sensitive words, and then do not accept such e-mail, which can help to avoid such e-mail. Do not click any link above to avoid being stolen
if the threat of extortion is violence, the perpetrator claims that it will be carried out in the future; The threat of kidnapping violence was implemented at that time and on the spot. The perpetrator of the crime of extortion does not abct the victim to hide and control, while the crime of kidnapping should abct the victim to hide and control
extended information:
the constituent elements of the crime of extortion:
1. Subjective elements
this crime shows direct intention in subjective aspect, and must have the purpose of illegally extorting other people's property. If the actor does not have this purpose, or the purpose of obtaining property is not illegal, for example, the creditor uses threatening language to urge the debtor to speed up the repayment in order to repay the long overe debt, it does not constitute the crime of extortion
The object of this crime is a complex object, which not only infringes the ownership of public and private property, but also endangers the personal rights or other rights and interests of others. This is one of the distinctive characteristics of this crime which is different from larceny and fraud. The object of this crime is public and private property2014 is the first year of mobile medical, because many people have just heard of this word or just moved their mind to try the water in this year
in 2015, heroes from all walks of life changed from heart to action, trying to open the door of medical st with their best posture. No matter landing smoothly or falling somersault, we all have a hard heart
I had the honor to visit nearly 30 start-up companies on the platform of Unicorn studio in one year, talked about nearly 100 investors and entrepreneurs, researched more than 100 start-up projects, and couldn't help but want to make a comprehensive year-end summary of mobile health
mobile medicine in 2015 is too colorful. Those who come to the competition, bet on the track, watch the excitement or splash cold water can find their favorite plot and draw their own preset conclusions. If you want to show the year of mobile medical in a few simple words, it will inevitably offend a large number of audiences. I'd like to take advantage of the five best-selling movies in 2015 to invite you to take your seats
speed and passion
only this movie can match the mobile medical treatment in 2015. Thanks to the third tier companies that have successfully secured the financing in 2014, thanks to the Internet plus policy of the state, from almost no one to pay attention to more than 3000 medical APP lines on the Internet for more than a year, only the enthusiasm of big steel can be matched.
registration and appointment, online consultation and follow-up of chronic diseases are the most popular entrepreneurial categories. Hundreds of apps called doctor XX can completely confuse you. In diabetes alone, unicorn studio has found more than 50 active apps. There are also many companies in the state of everything ready, only programmers can start
those who have nothing to do with medicine come in to do mobile medicine. Who makes us care about human health? Medical treatment is a 3 trillion plate, including 8 trillion yuan for big health. No wonder Renhe pharmaceutical has set to increase its investment by more than 1 billion yuan on o2o, Ping'an has self-employed hundreds of doctors to do online consultation, Didi has taken a taxi to bring doctors home, registered network has obtained hundreds of millions of US dollars of high price financing, and Ma Yun has called out that doctors will lose their jobs in 30 years
temptation and fear make us remember mobile medical deeply
incredible
after watching mobile healthcare for a year, I can only say that there are too many wonderful places. The 51st document of the health and Family Planning Commission stipulates that medical diagnosis and treatment can not be done online, public hospitals face south, medical insurance does not pay for disease prevention, doctors are unable to practice freely, and the supply of high-quality medical resources is in short supply, all of which determine that mobile medicine is malnourished at birth. There is a lack of wearable hardware and commercial insurance support, and mobile health care is not cheap for patients
although there are a lot of mobile medical services, there are still very few areas that we can do. Naturally, we need to learn from each other. Many apps claim to be used by tens of thousands of doctors or millions of patients, but it seems that no one is using them. Many companies dare to expand from 30 or 50 people to 300 or 500 people in a year. They have no profit, no income, and even can't see where their income is. The only thing that supports their confidence is VC's money and operating figures that don't know whether they are true or false. The instry thinks that a company with a fruit in its name will be the first to fall down next year. I hope it will not affect too many people
disagreers
while entrepreneurship is booming, users are watching coldly; On the other hand, Internet plus medical treatment is good, while medical treatment plus Internet is the right way. While mobile medical represents the future, mobile medical has no future
in 2015, there was an unprecedented divergence in mobile medicine: an anonymous article can almost "knock down" the benchmark of mobile medicine, doctor Chunyu; President Wang Shan, who is enthusiastic about "medical informatization", and Zhang Rui, who advocates "medical decentralization", interrupted each other 18 times in a dialogue; China's largest mobile medical company, the Internet, and Putian private hospital, its biggest financial owner, have made public the contradictions in medical advertising; Some people said that as soon as mobile medical started, others sang that mobile medical entered the second half; At the end of last year, investors did not invest in mobile Internet. At the end of this year, they did not invest in medical income
some people are optimistic about mobile healthcare, while others are pessimistic. No theory can convince the public, and no model can work
Charlotte worries
it's hard for small start-ups to start, and mobile medical leaders also worry a lot. Although the registration network has raised $400 million, which is equal to the total angel investment of hundreds of small companies. However, online traffic can't be realized, and registration can't receive money. Doctor Chunyu, Ding Xiangyuan and registration network have set up offline clinics and hospitals one after another. Good doctors have extended from triage to follow-up. After the e-commerce business of Ali health medicine was frustrated, cloud hospital and online medical service are still not popular. Tencent admits that it doesn't understand medical service, so it invests in companies that it thinks can connect medical information and doctors and patients, It's said that brother pony wants to divide the territory for several companies. Don't kill each other<
Mars rescue
entrepreneurs are all undeniable, and they don't have time to pay attention to other people's ideas. Just like Matt Dimon, who is forgotten on Mars, only when he desperately finds some poor resources can he survive until others come to save you
cooperation between mobile healthcare and commercial insurance is a hot topic in the second half of the year. Both "Tui Tang Gu" and "Teng AI Tang doctor" have been playing seriously. AstraZeneca, Sanofi and Pfizer have made deep alliances with mobile healthcare, and they all want to spend the hard winter of the instry by taking advantage of each other's temperature. Yuyue, Lepu and FRISO want to make their own mobile healthcare, which is to be an app, Who says that programmers in pharmaceutical companies can't solve the problem of difficult medical treatment
the State encourages doctors to practice more, and the closed medical door seems to open a crack. VC does not want to invest in a doctor group, so they are embarrassed to go out and greet people. As soon as the State encourages the implementation of hierarchical diagnosis and treatment, a number of companies have sprung up to do referral flying knife, "responsible medical organization", "integrated medical care" and "Caesar model" have also come
the informatization project, which lays the foundation for mobile medical, has not won enough attention, whether it is Omaha alliance, which advocates medical data standardization and public sharing, or the first Xuanwu Hospital Project invited by Apple Research Kit, or the first cloud hospital in Ningbo and the first Internet hospital in Wuzhen, or the "image cloud" project cooperated by Xi'an yinggu and China Telecom, Their huge heat will be released in the next few years, earth shaking is unknown
if medical e-commerce is also considered as the extension of mobile medicine, this is the most appetizing part of the annual drama. If you want to come, you always don't. You've already put in a lot of money. Even super players like Sinopharm have joined hands with 360 and Jingdong early, waiting for the policy to start. The future of pharmaceutical enterprises is very painful. The interests of hospitals will not be released. It is difficult to change the habits of patients. We will see the benefits of pharmaceutical e-commerce
or this sentence: whether you like 2015 mobile healthcare or not, its story and performance are vivid. You can doubt mobile medicine, but if you ignore it, you will miss a good play
in 2016, there are many suspenses about China's economy. Only when structural adjustment can land smoothly and the original interest pattern is broken can new instries take root. Will the value of mobile healthcare come to light? Will mobile medicine be everywhere or will it be a great success? Which companies will become unicorns of mobile medical? You can preset your own answers and wait for next year to test them.
病毒
[词典] [医] virus; inframicrobe 滤过性; [电影] Wirus;
[例句]
In the effort to understand AIDS, attention is moving from the virus to the immune system.
public key and private key are terms in asymmetric encryption of modern cryptography. They usually encrypt information with public key and decrypt information with private key. Why? Because when you watch TV dramas, telegrams are encrypted symmetrically. The disadvantages of this encryption method are obvious. If someone knows the key and encryption method, they can decrypt the telegrams according to the encryption method. Until asymmetric encryption, the situation has changed. Public key is the key that can be made public all over the world. For example, when you communicate with Google, you encrypt with the 1024 bit public key given by Google and send it to Google. Only he has the corresponding private key, and only he can decrypt it, so the communication security is ensured
2. Bitcoin mainly uses ECDSA, which is the elliptic curve signature algorithm, This algorithm has two characteristics. Note that these two points are very important to the following
A. as long as you know the private key, you can calculate the corresponding public key
B. If you have signed something with the private key, you can use the public key to calculate whether you signed it or not
3. After knowledge preparation, let's start with the transaction of bitcoin. In fact, bitcoin has no wallet, only transaction bills, and the whole bitcoin is a lot of transaction bills
for example:
bill 1 transfers from a to B to XXX bitcoin
Bill 2 transfers from B to C and D to XXX bitcoin
bill 3 transfers from C to e to XXX bitcoin
.... Anyone who downloads the client can receive all the bills from the day when bitcoin was established, so as long as all the bills are downloaded, they will naturally know how much money should be left on each account (think carefully here)
4. The account of bitcoin is the public key mentioned just now
5, Here is the core part!!! Each bill is a piece of data. After you sign it, it will be sent to the whole network, and the data structure will be reversed into easy to understand Chinese. The explanation is as follows:
from (who sent it, including two parts)
previous TX: the ID of the bill for which you want to spend the money, that is to say, any money you spend should have been transferred to you, You need to show the ID of the bill
scriptsig: your signature for this transaction is to hash the bill with your private key, only you can do this hash
to (who accepts, including two parts)
value: how much to send
scriptpubkey: the public key of the other party, and the bitcoin account is a public key
6, How to send it? Bitcoin communication is not so complicated. You can compare it to IRC channel, but different from ordinary "IRC", any client is an "IRC" server. When you start the client, you will receive the client address with public IP around, that is, the "server" list. This list is constantly refreshed, and it is all other bitcoin users, So when you shout a word in this "IRC", people around you will hear it and spread it all over the world
7. After sending the signature to the whole world, all the clients who receive this list will verify whether your signature is correct, whether you sent it, and whether you have so much money (according to the historical transaction, you can calculate how much money you have to spend)
if you have calculated this transaction, it's OK, Basically, the transfer is successful
8. In fact, the other party has accepted bitcoin, but in order to spend it, he must have the private key corresponding to the address (public key). So he can fill in the from header of a form. Previous TX is the serial number of the transaction just now. Scriptsig fills in the hash signed with his private key...