Why bitcoin is used for criminal purposes

2.

In 2008, a pseudonym software developer proposed bitcoin as an electronic payment system based on mathematical proof. The idea is to create a means of exchange independent of any central authority that can be transferred electronically in a secure, verifiable and unchangeable manner

bitcoin is a kind of P2P virtual digital currency based on blockchain technology, which can be traded with the world

bitcoin can be used for many purposes, including providing funds for companies, investing in cash and transferring money free of charge. Bitcoin is usually associated with criminal activities such as drug trading, cyber crime and money laundering, because it is almost impossible to associate bitcoin wallet with anyone

3. The following is from: http://bitcoin.org/zh_ Cn / about

historical background

bitcoin is one of the first currencies to realize the concept of "cryptocurrency". In 1998, Wei Dai first expounded the concept of "cryptocurrency" in cypherpunks mailing list. Based on the basic concept of money, which is used to pay for goods, services and debt or any form of records in a given country or economy, bitcoin is a new form of money. Its original design is to integrate the idea of not relying on the central authority, using the principle of cryptography to control the issuance and transaction of money
in 2009, Satoshi Nakamoto published the first bitcoin specification and its proof of concept in the cryptography mailing list. At the end of 2010, Nakamoto claimed that he had transferred to other affairs and left the project. The creator of bitcoin never revealed his true identity, but left his invention to the world. Today, the origin and motivation of the invention of bitcoin is still a mysterious story
since 2010, many developers have devoted themselves to this project, and the bitcoin community has grown rapidly. Between June and July 2011, bitcoin suddenly gained media attention, leading to large-scale buying. The resulting bubble led to the continued decline in the price of bitcoin in the second half of 2011. After that, the price of bitcoin graally rose to the height of 2011
in order to regulate, protect and promote the development of bitcoin, the bitcoin foundation was established on September 27, 2012. Nowadays, with the increasing number of bitcoin users, bitcoin economy is developing rapidly

technical features

any network like bitcoin has the following basic features:
bitcoin can be transferred between any node of the network
the transaction is irreversible
the use of block chain avoids the occurrence of double consumption
the transaction will spread out in a few seconds and pass validation in 10 to 60 minutes
transaction processing and currency issuance are carried out through mining
bitcoin can be received at any time whether it is online or not<

economic rules

the whole bitcoin network jointly implements the following rules:
the total amount of bitcoin issued is about 21 million
a bitcoin can be divided into 8 decimal places, with a total of about 21 × 1014 monetary units
transaction costs are very low and most of them are free

statistics

bitcoin network has been running continuously for more than 48 months. In the past year, bitcoin's security features have attracted attention and developed significantly. As of April 2013:
the longest block chain has more than 232000 blocks
one of the largest distributed computing networks in the world, with more than 65 trillion hashes per second
there are 50000 transactions every day, with a total amount of several million US dollars
the total value of bitcoin in circulation exceeds US $1.3 billion
there is only one major security incident in the protocol, which was resolved in August 2010

other information can be referred to:
Network: http://ke..com/view/5784548.htm
bitcoin official website: http://bitcoin.org/zh_ CN/

4. Bitcoin: also known as "bitcoin", is a kind of network virtual currency. Internet users can use bitcoin to buy some virtual goods, such as clothes, hats and equipment in online games. Internet users can also use bitcoin to buy real goods
the concept of bitcoin was first proposed by Nakamoto in 2009. According to Nakamoto's ideas, open source software was designed and released, and P2P network was built on it. Bitcoin is a kind of P2P digital currency. Point to point transmission means a decentralized payment system
unlike most currencies, bitcoin does not rely on specific currency institutions. It is generated by a large number of calculations based on specific algorithms. Bitcoin economy uses a distributed database composed of many nodes in the whole P2P network to confirm and record all transactions, and uses cryptography design to ensure the security of all aspects of currency circulation.

5. It's not a hierarchical test< At present, there are two types of gene testing that you can contact with. One is consumer grade, with many advertisements and relatively low prices. It is well known to the public that you can join in, what packages you have, and discounts. It is often * * gene company, or * * gene for short. wait. The test results can only be used as a reference, as a basis for decision, there is the possibility of error
the other is clinical grade, with few advertisements. It is often the laboratory of the laboratory or scientific research institution in a large hospital, and it is often used to detect one or several points of a certain kind of disease, with high cost and high accuracy. As long as there is no problem in sampling, the results will be OK
therefore, if you have such a demand, it is recommended to go to an institution with a molecular laboratory, whose test is clinical grade.

6. Virtual currency does not belong to electronic currency. There's a bit of a similarity. E-money is the electronic circulation of money, that is to say, the fundamental nature of e-money and money is the same. Virtual currency, from the beginning of q-coin game currency to the present bitcoin, bcbot and other digital currencies, belongs to virtual currency, which belongs to the activity of decentralization that has not been recognized, although digital currency also has some attributes of electronic currency.

8. As a virtual currency, bitcoin has the characteristics of borderless and cross-border
ordinary cross-border remittance will go through layers of foreign exchange control institutions, and the transaction records will be recorded by many parties. But if you trade with bitcoin, enter the digital address directly, click the mouse and wait for the P2P network to confirm the transaction, a lot of money will pass. It does not go through any regulatory agencies and will not leave any cross-border transaction records
criminals convert the stolen money into bitcoin before trading. With the current technical means, the public security organs can not investigate the capital flow.

9. First, security; second, irreversibility; third, versatility.