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User:Bluedecklibrary/Draft:密碼貨幣

维基百科，自由的百科全书

{{vfd|廢棄草稿|date=2018/03/17}}

加密貨幣(cryptocurrency)是一種使用密碼學來確保交易安全及控制交易單位創造的交易媒介。[1] 加密貨幣是數位貨幣的一種 。比特幣在2009年成為第一個去中心化的加密貨幣，這之後加密貨幣一詞多指此類設計。[2] 自此之後數種類似的加密貨幣被創造，它們通常被稱作altcoins。  [3][4]加密貨幣仰賴去中心化的控制[5] ，與銀行的中心化電子金融系統相對。[6] 

去中心化的性質源自於以分散式帳本的方式使用的區塊鍊(Blockchain)技術.[7]

Overview

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Decentralized cryptocurrency is produced by the entire cryptocurrency system collectively, at a rate which is defined when the system is created and which is publicly known. In centralized banking and economic systems such as the 联邦储备系统, corporate boards or governments control the supply of currency by printing units of 法定貨幣 or demanding additions to digital banking ledgers. However, companies or governments cannot produce units of cryptocurrency and as such, have not so far provided backing for other firms, banks or corporate entities which hold asset value measured in a decentralized cryptocurrency. The underlying technical system upon which decentralized cryptocurrencies are based was created by the group or individual known as 中本聪.[8][9][10]

{{As of|March 2015}}, hundreds of cryptocurrency specifications exist; most are similar to and 复刻 (软件工程) the first fully implemented decentralized cryptocurrency, bitcoin.[11][12] Within cryptocurrency systems the safety, integrity and balance of {{tsl|en|ledgers}} is maintained by a community of mutually distrustful parties referred to as miners: members of the general public using their computers to help validate and timestamp transactions adding them to the ledger in accordance with a particular timestamping scheme.[13]

The security of cryptocurrency ledgers is based on the assumption that the majority of miners are honestly trying to maintain the ledger, having financial incentive to do so.

Most cryptocurrencies are designed to gradually decrease production of currency, placing an ultimate cap on the total amount of currency that will ever be in circulation. This can mimic the scarcity (and value) of 貴金屬s and avoid 恶性通货膨胀.[1][14] Compared with ordinary currencies held by financial institutions or kept as 現金 on hand, cryptocurrencies are less susceptible to {{tsl|en|Search and seizure}} by law enforcement.[1][15]{{Failed verification|last reference only|date=July 2014}} Existing cryptocurrencies are all pseudo-anonymous, though additions such as {{tsl|en|Zerocoin}} and its distributed laundry[16] feature have been suggested, which would allow for true 匿名.[17][18][19]

History

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In 1998, Wei Dai published a description of "b-money", an anonymous, distributed electronic cash system.[20] Shortly thereafter, Nick Szabo created "Bit Gold".[21] Like bitcoin and other cryptocurrencies that would follow it, Bit Gold was an electronic currency system which required users to complete a proof of work function with solutions being cryptographically put together and published.

The first decentralized cryptocurrency, bitcoin, was created in 2009 by 化名 软件设计师 中本聪. It used SHA-2, a cryptographic hash function, as its proof-of-work scheme.[22][23][24] In April 2011, {{tsl|en|Namecoin}} was created as an attempt at forming a decentralized 域名系统, which would make 互联网审查 very difficult. Soon after, in October 2011, 莱特币 was released. It was the first successful cryptocurrency to use {{tsl|en|scrypt}} as its hash function instead of SHA-256. Another notable cryptocurrency, {{tsl|en|Peercoin}} was the first to use a proof-of-work/proof-of-stake hybrid.[25] Many other cryptocurrencies have been created though few have been successful, as they have brought little in the way of technical innovation. On 6 August 2014, the UK announced its 英国财政部 had been commissioned to do a study of cryptocurrencies, and what role, if any, they can play in the UK economy. The study was also to report on whether regulation should be considered.[26]

Starting 2014, a so-called 2nd generation of cryptocurrencies appeared, like 门罗币, Ethereum and {{tsl|en|Nxt}}. They have advanced functionalities like stealth addresses, {{tsl|en|smart contracts}}, side chains or assets.

Publicity

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Central bank representatives have stated that the adoption of cryptocurrencies such as bitcoin pose a significant challenge to central banks' ability to influence the price of credit for the whole economy. They have also stated that as trade using cryptocurrencies become more popular, there is bound to be a loss of consumer confidence in fiat currencies. Gareth Murphy, a senior central banking officer has stated "widespread use [of cryptocurrency] would also make it more difficult for statistical agencies to gather data on economic activity, which are used by governments to steer the economy". He cautioned that virtual currencies pose a new challenge to central banks' control over the important functions of monetary and exchange rate policy.[27]

Jordan Kelley, founder of {{tsl|en|Bitcoin ATM}}, launched the first bitcoin ATM in the United States on February 20, 2014. The kiosk installed in Austin, Texas is similar to bank ATMs but has scanners to read government-issued identification such as a driver's license or a passport to confirm users' identities.[28]

The 多吉币 Foundation, a charitable organization centered around Dogecoin and co-founded by Dogecoin co-creator Jackson Palmer, donated more than $30,000 worth of Dogecoin to help fund the {{tsl|en|Jamaican bobsled team}}'s trip to the 2014年冬季奥林匹克运动会 in Sochi, Russia.[29] The growing community around Dogecoin is looking to cement its charitable credentials by raising funds to sponsor service dogs for children with special needs.[30]

Bankcoin based in Queensland, Australia partnered with SyndicatedNews.NET based in Titusville, Florida, USA preparing for a 2016 State of Florida Money License and Registration with the U.S. Treasury's FinCEN Division. http://www.reuters.com/article/fl-syndicatednewsnet-idUSnBw305295a+100+BSW20151130

Legality

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The legal status of cryptocurrencies varies substantially from country to country and is still undefined or changing in many of them. While some countries have explicitly allowed their use and trade, others have banned or restricted it. Likewise, various government agencies, departments, and courts have classified bitcoins differently. 中国人民银行 banned the handling of bitcoins by financial institutions in 中华人民共和国 during an extremely fast adoption period in early 2014.[31] In Russia, though cryptocurrencies are legal, it is illegal to actually purchase goods with any currency other than the Russian ruble.[32]

On March 25, 2014, the United States 美国国家税务局 (IRS) ruled that bitcoin will be treated as property for tax purposes as opposed to currency. This means bitcoin will be subject to {{tsl|en|capital gains tax}}. One benefit of this ruling is that it clarifies the legality of bitcoin. No longer do investors need to worry that investments in or profit made from bitcoins are illegal or how to report them to the IRS.[33] In a paper published by researchers from Oxford and Warwick it was shown that bitcoin has some characteristics similar to the precious metals market more than to traditional currencies, hence in agreement to the IRS decision even if based on different reasons.[34]

Legal issues not dealing with governments have also arisen for cryptocurrencies. {{tsl|en|Coinye}}, for example, is an altcoin that used rapper 肯伊·威斯特 as its logo without permission. Upon hearing of the release of Coinye, originally called Coinye West, attorneys for Kanye West sent a cease and desist letter to the email operator of Coinye, {{tsl|en|David P. McEnery Jr.}} The letter stated that Coinye was willful trademark infringement, unfair competition, cyberpiracy, and dilution and instructed Coinye to stop using the likeness and name of Kanye West.[35]

Concerns of an unregulated global economy

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As the popularity of and demand for online currencies increases since the inception of bitcoin in 2009,[36] so do concerns that such an unregulated person to person global economy that cryptocurrency denominations offer may become threats to society as a whole. Concerns abound that altcoins may become tools for anonymous web criminals.[37]

Cryptocurrency networks display a marked lack of regulation that attracts many users who seek decentralized exchange and use of currency, however these very same lack of regulations have been critiqued as potentially enabling criminals who seek to evade taxes and launder money.

Transactions that occur through the use and exchange of these altcoins are independent from formal banking systems, and therefore can make tax evasion simpler for individuals. Since charting taxable income is based only upon what a recipient reports to the IRS, it becomes extremely difficult to account for transactions made using existing cryptocurrencies, a mode of exchange that is complex (and in some cases impossible) to track.[37]

Systems of anonymity that most cryptocurrencies offer can also serve as a simpler means to launder money. Rather than laundering money through an intricate net of financial actors and offshore bank accounts, laundering money through altcoins stands outside institutions and can be achieved through anonymous transactions.[37] Laundering services for cryptocurrency exist to service the bitcoin currency, in which multiple sourced bitcoins are blended to obscure the relationship between input and output addresses.[37]

Arrests

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There have been very few arrests in the United States related to cryptocurrency.{{cn|date=October 2015}} This is primarily due to the difficulty of tracking cryptocurrency payments.{{cn|date=October 2015}} The arrests that have been made are all on charges of using cryptocurrency to launder money.{{cn|date=October 2015}} A notable case was the arrest of {{tsl|en|Charlie Shrem}}, the CEO of {{tsl|en|BitInstant}}.[38][39]

In Florida, a localbitcoins.com user was charged with felony violations of Florida’s law against unlicensed money transmitters for transmitting $30k. He was arrested by an undercover cop pretending to be a customer.[40]{{better source|date=October 2015}}

Fraud

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On August 6, 2013, Magistrate Judge Amos Mazzant of the Eastern District of Texas federal court ruled that because cryptocurrency (expressly bitcoin) can be used as money (it can be used to purchase goods and services, pay for individual living expenses, and exchanged for conventional currencies), it is a currency or form of money. This ruling allowed for the 美国证券交易委员会 to have jurisdiction over cases of securities fraud involving cryptocurrency.[41]

GBL, a Chinese bitcoin trading platform, suddenly shut down on October 26, 2013. Subscribers, unable to login, lost up to $5 million worth of bitcoin.[42][43][44]

In February 2014, cryptocurrency made national headlines due to the world's largest bitcoin exchange, Mt. Gox, declaring 破產. The company stated that it had lost nearly $473 million of their customer's bitcoins likely due to theft. This was equivalent to approximately 750,000 bitcoins, or about 7% of all the bitcoins in existence. Due to this crisis, among other news, the price of a bitcoin fell from a high of about $1,160 in December to under $400 in February.[45]

On March 31, 2015, two now-former agents from the Drug Enforcement Administration and the U.S. Secret Service were charged with wire fraud, money laundering and other offenses for allegedly stealing bitcoin during the federal investigation of 絲路 (購物網站), an underground illicit black market federal prosecutors shut down in 2013.[46]

On December 1, 2015, Homero Joshua Garza stands accused of securities fraud following his development of the cryptocurrency known as Paycoin. Garza was the owner of the now defunct GAW Miners website that sold mining equipment for cryptocurrency. Garza is accused of masterminding an elaborate ponzi scheme under the guise of "cloud mining" with mining equipment hosted in a data center. Garza purported the cloud miners known as "hashlets" to be mining cryptocurrency within the Zenportal "cloud" when in fact there were no miners actively mining cryptocurrency. Zenportal had over 10,000 users that had purchased hashlets to the tune of over 19 million U.S. dollars. [47] GAW Miners was co-founded by Homero Joshua Garza and Stuart Fraser of Cantor Fitzgerald, a well known securities company. [48]

Darknet markets

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{{main|Darknet market}} Cryptocurrency is also used in controversial settings in the form of {{tsl|en|darknet market}}, such as 絲路 (購物網站). The original 絲路 (購物網站) was shut down in October 2013 and there have been two more versions in use since then; the current version being Silk Road 3.0. The successful format of 絲路 (購物網站) has been widely used in online dark markets, which has led to a subsequent decentralization of the online dark market. In the year following the initial shutdown of Silk Road, the number of prominent dark markets increased from four to twelve, while the amount of drug listings doubled from 18,000 to 32,000.[37]

Darknet markets present growing challenges in regard to legality. Bitcoins and other forms of cryptocurrency used in dark markets are not clearly or legally classified in almost all parts of the world. In the U.S., bitcoins are labelled as "virtual assets". This type of ambiguous classification puts mounting pressure on law enforcement agencies around the world to adapt to the shifting drug trade of dark markets.[49]

Since most darknet markets run through Tor, they can be found with relative ease on public domains. This means that their addresses can be found, as well as customer reviews and open forums pertaining to the drugs being sold on the market, all without incriminating any form of user.[37] This kind of anonymity enables users on both sides of dark markets to escape the reaches of law enforcement. The result is that law enforcement adheres to a campaign of singling out individual markets and drug dealers to cut down supply. However, dealers and suppliers are able to stay one step ahead of law enforcement, who cannot keep up with the rapidly expanding and anonymous marketplaces of dark markets.[49]

Timestamping

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Cryptocurrencies use various timestamping schemes to avoid the need for a trusted third party to timestamp transactions added to the block chain ledger.

Proof-of-work schemes

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The first timestamping scheme invented was the proof-of-work scheme. The most widely used proof-of-work schemes are based on SHA-256, which was introduced by bitcoin, and {{tsl|en|scrypt}}, which is used by currencies such as Litecoin.[25] The latter now dominates over the world of cryptocurrencies, with at least 480 confirmed implementations.[50]

Some other hashing algorithms that are used for proof-of-work include {{tsl|en|CryptoNote#Egalitarian proof of work}}, {{tsl|en|BLAKE (hash function)}}, SHA-3, and {{tsl|en|Dash (cryptocurrency)#X11}}.

Proof-of-stake and combined schemes

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Some cryptocurrencies use a combined proof-of-work/proof-of-stake scheme,[25][51] The Proof-of-stake is a method of securing a cryptocurrency network and achieving distributed consensus through requesting users to show ownership of a certain amount of currency. It is different from proof-of-work systems that run difficult hashing algorithms to validate electronic transactions. The scheme is largely code dependent on the coin, and there's currently no standard form of it.

Economics of cryptocurrency

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Cryptocurrencies are digital currencies which are used primarily outside existing banking and governmental institutions, exchanged over the internet. While these alternative, decentralized modes of exchange are in the early stages of development, they have the unique potential to challenge existing systems of currency and payments.

Competition in cryptocurrency markets

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Today, there are over 200 digital currencies in existence. Entry into the marketplace is undertaken by so many due to the low cost of entry and opportunity for profit making through the creation of coins.

Network Effects/ play an important role in analyzing the development of cryptocurrency markets. Since any given currency gains use value as the number of its users increase, popularity of a certain currency is integral in that currency's success. Economists postulate that large competitors (such as the most popular mode of cryptocurrency: bitcoin) will attract more new users due to the size of their growing exchange pools and as a result will effectively dominate the market.

A study entitled "Competition in the Cryptocurrency Market" conducted by members of the NET Institute over three periods between 2013 and 2014 charts the analysis of changes in price data over time in regards to budding cryptocurrency markets. It analyzes bitcoin and other similar cryptocurrencies referred to as "altcoins". These include Litecoin, Peercoin, and Namecoin; cryptocurrencies listed in order by which account for the largest percentages of digital market capitalization behind bitcoin (which accounts for 90%).

The NET study found that of these four, all were early entrants into the digital currency marketplace, designed to correct perceived bitcoin's flaws and amass popularity in an infant market whose popularity was rapidly growing. This study introduced the question of the role of demand in cryptocurrency markets, and what impetus demand has in relation to emerging coins. The study dealt namely with two common forces of demand that shaped the market: reinforcement and substitution effects. The reinforcement effect expects demand to increase based on usership, and that the cryptocurrency that could gain the most buyers and sellers would win out above all others, thus dominating the marketplace. The substitution effect implies that as the price of bitcoins rose with increased usership, people would begin to look for other options in the cryptocurrency market, thus discouraging any one coin from gaining complete dominance.

List of cryptocurrencies

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{{Main|List of cryptocurrencies}}

Academic studies

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In September 2015, the establishment of the 同行評審 学术期刊 Ledger ({{ISSN|2379-5980}}) was announced. It will cover studies of cryptocurrencies and related technologies and is published by the 匹茲堡大學.[52][53] The journal encourages authors to 數位簽章 a 散列函數 of submitted papers, which will then be {{tsl|en|Trusted timestamping}} into the bitcoin 区块链. Authors are also asked to include a personal bitcoin address in the first page of their papers.[54]

Criticism

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  • Journalists Joshua Brustein and Timothy Lee expressed concern that bitcoin is problematic due to its high 波动性.[55]
  • Jason O'Grady reported {{tsl|en|pump and dump}} schemes in altcoins distinct from bitcoin and Litecoin.[56]
  • Community refers to premining, hidden launches, or extreme rewards for the altcoin founders as a deceptive practice,[57] but it can also be used as an inherent part of a digital cryptocurrency's design, as in the case of Ripple.[58] Pre-mining means currency is generated by the currency's founders prior to mining code being released to the public.[59]
  • Most cryptocurrencies are duplicates of existing cryptocurrencies with minor changes and no novel technical developments. One such, {{tsl|en|Coinye}}, a comedy cryptocurrency alluding to the rapper Kanye West, was served a 停止并终止 letter on 7 January 2014, for using West's name and implying a connection that did not exist.[60]
  • Banks generally do not offer services for cryptocurrencies and sometimes refuse to offer services to virtual-currency companies.[61]
  • There are ways to permanently lose cryptocurrency from local storage due to 恶意软件 or data loss. This can also happen through the destruction of the physical media, effectively removing lost cryptocurrencies forever from their markets.[62]
  • There are many perceived criteria that cryptocurrencies must reach before they can become mainstream. The number of merchants accepting cryptocurrencies is increasing, but still only a few merchants accept them.[63]
  • With technological advancement in cryptocurrencies such as bitcoin, the cost of entry for miners requiring specialized 硬件 and 软件 is high.[64]
  • Cryptocurrency transactions are normally irreversible after a number of blocks confirm the transaction. One of the features cryptocurrency lacks in comparison to credit cards is consumer protection against fraud, such as 退单拒付s.[13]
  • Some coins may be a project with little to no community backing and no visible developer.[65]
  • While cryptocurrencies are digital currencies that are managed through advanced encryption techniques, many governments have taken a cautious approach toward them, fearing their lack of central control and the effects they could have on financial security.[66]
  • Environmentally conscious people are concerned with the enormous amount of energy that goes into cryptocurrency mining with little to show in return, but it is important to compare it to the consumption of the legacy financial system.[67]
  • Traditional financial products have strong consumer protections. However, if bitcoins are lost or stolen, there is no intermediary with the power to limit consumer losses.[68]
  • Regulators in several countries have warned against their use and some have taken concrete regulatory measures to dissuade users.[69]

See also

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References

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{{Reflist|30em|refs= [4]

[3]

[25]

[44]

[43]

[42]

[22]}}

Further reading

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  • {{Commonscat-inline|Cryptocurrency}}

{{Means of Exchange}} {{Cryptography navbox}} {{Cryptocurrencies}} {{Bitcoin}} {{Portal bar|Business and economics|Cryptography|Free software|Numismatics}}

Category:密碼貨幣 Category:金融技術 Category:權力分散

  1. ^ 1.0 1.1 1.2 Andy Greenberg (20 April 2011).
  2. ^ Sagona-Stophel, Katherine.
  3. ^ 3.0 3.1 "Altcoin". 引用错误：带有name属性“altcoin1”的<ref>标签用不同内容定义了多次
  4. ^ 4.0 4.1 Wilmoth, Josiah. 引用错误：带有name属性“altcoin”的<ref>标签用不同内容定义了多次
  5. ^ McDonnell, Patrick "PK" (9 September 2015).
  6. ^ Allison, Ian (8 September 2015).
  7. ^ "All you need to know about Bitcoin". timesofindia-economictimes. 
  8. ^ Bitcoin-block-signing History, http://blockchain.info, 2 March 2014
  9. ^ Deflation and Banking, http://www.econlib.org, 19 December 2006
  10. ^ Bitcoin Creation Mechanism, https://en.bitcoin.it, 12 January 2014
  11. ^ Listing of active coins, http://cryptocoincharts.info, 27 February 2014
  12. ^ another authentication protocol forked from P.O.S., https://en.bitcoin.it, 7 June 2013
  13. ^ 13.0 13.1 {{cite web | url=http://mercatus.org/sites/default/files/Brito_BitcoinPrimer.pdf | title=Bitcoin: A Primer for Policymakers | publisher=George Mason University | work=Mercatus Center | year=2013 | accessdate=22 October 2013 | author=Jerry Brito and Andrea Castillo}}
  14. ^ How Cryptocurrencies Could Upend Banks' Monetary Role, American Banker, 26 May 2013
  15. ^ The FBI's Plan For The Millions Worth Of Bitcoins Seized From Silk Road, Forbes, 4 October 2013
  16. ^ {{cite web|title=Zerocoin - Making bitcoin anonymous|url=http://blog.cryptographyengineering.com/2013/04/zerocoin-making-bitcoin-anonymous.html%7Cwebsite=cryptographyengineering.com%7Caccessdate=2 June 2014|year=2013}}
  17. ^ 'Zerocoin' Add-on For Bitcoin Could Make It Truly Anonymous And Untraceable, Forbes, 26 May 2013
  18. ^ {{cite web|author1=Matthew Green|title=Zerocoin: Anonymous Distributed E-Cash from Bitcoin|url=http://spar.isi.jhu.edu/~mgreen/ZerocoinOakland.pdf%7Cpublisher=约翰·霍普金斯大学|format=pdf|date=26 May 2013}}
  19. ^ This is Huge: Gold 2.0 - Can code and competition build a better Bitcoin?, New Bitcoin World, 26 May 2013
  20. ^ {{cite web|title=B-Money|url=http://www.weidai.com/bmoney.txt%7Cauthor=Wei Dai|year=1998}}
  21. ^ {{cite web|url=http://spectrum.ieee.org/computing/software/bitcoin-the-cryptoanarchists-answer-to-cash/0%7Ctitle=Bitcoin: The Cryptoanarchists’ Answer to Cash|publisher=IEEE Spectrum|quote=Around the same time, Nick Szabo, a computer scientist who now blogs about law and the history of money, was one of the first to imagine a new digital currency from the ground up. Although many consider his scheme, which he calls “bit gold,” to be a precursor to Bitcoin}}
  22. ^ 22.0 22.1 {{cite web|last1=Brito|first1=Jerry|last2=Castillo|first2=Andrea|title=Bitcoin: A primer for policy makers|url=http://mercatus.org/sites/default/files/Brito_BitcoinPrimer.pdf%7Cpublisher=George Mason University|work=Mercatus Center|accessdate=31 October 2015|date=31 August 2013}}
  23. ^ What is Bitcoin Mining?, The Genesis Block, 26 May 2013
  24. ^ Bitcoin developer chats about regulation, open source, and the elusive Satoshi Nakamoto, PCWorld, 26-05-2013
  25. ^ 25.0 25.1 25.2 25.3 Wary of Bitcoin? A guide to some other cryptocurrencies, ars technica, 26-05-2013
  26. ^ {{cite news|title=UK launches initiative to explore potential of virtual currencies|url=http://www.theuknews.com/index.php/sid/224504231%7Caccessdate=8 August 2014|publisher=The UK News}}
  27. ^ decentralized currencies impact on central banks, rte News, 3 April 2014
  28. ^ First U.S. Bitcoin ATMs to open soon in Seattle, Austin, Reuters, 18 February 2014
  29. ^ Dogecoin Users Raise $30,000 to Send Jamaican Bobsled Team to Winter Olympics, Digital Trends, 20 January 2014
  30. ^ Dogecoin Community Raising $30,000 for Children's Charity, International Business Times, 4 February 2014
  31. ^ {{cite web|url=http://bitcoinmagazine.com/12839/big-picture-china-bitcoin/%7Ctitle=The Big Picture Behind the News of China's Bitcoin Bans – Bitcoin Magazine|work=Bitcoin Magazine|accessdate=24 February 2015}}
  32. ^ Bitcoin's Legality Around The World, Forbes, 31 January 2014
  33. ^ 3 Reasons The IRS Bitcoin Ruling Is Good For Bitcoin, Nasdaq, 24 March 2014
  34. ^ On the Complexity and Behaviour of Cryptocurrencies Compared to Other Markets, 7 November 2014
  35. ^ Infringement of Kayne West Mark and Other Violations, Pryor Cashman LLP, 6 January 2014
  36. ^ Iwamura, Mitsuru and Kitamura, Yukinobu and Matsumoto, Tsutomu, Is Bitcoin the Only Cryptocurrency in the Town? Economics of Cryptocurrency And Friedrich A. Hayek (February 28, 2014). Available at SSRN: http://ssrn.com/abstract=2405790 or http://dx.doi.org/10.2139/ssrn.2405790
  37. ^ 37.0 37.1 37.2 37.3 37.4 37.5 ALI, S, T; CLARKE, D; MCCORRY, P; Bitcoin: Perils of an Unregulated Global P2P Currency [By S. T Ali, D. Clarke, P. McCorry Newcastle upon Tyne: Newcastle University: Computing Science, 2015. (Newcastle University, Computing Science, Technical Report Series, No. CS-TR-1470)
  38. ^ http://blogs.wsj.com/law/2015/03/30/bitcoin-entrepreneur-charlie-shrem-reports-to-prison/
  39. ^ {{cite web|url=http://www.acfe.com/fraud-examiner.aspx?id=4294980488%7Ctitle=Tracking the Intangible: How Fraud Examiners Are Busting Bitcoin Fraud|publisher=|accessdate=24 February 2015}}
  40. ^ Florida Targets High-Dollar Bitcoin Exchangers, Krebs on Security, February 2014
  41. ^ SEC v Shavers, United States District Court Eastern District Of Texas, 08-06-2013
  42. ^ 42.0 42.1 Vanishing Bitcoins: $5 million in crypto-currency lost down a Chinese memory hole, 21st Century Wire, 12-11-2013
  43. ^ 43.0 43.1 {{cite web|title=Banshee bitcoins: $5 million worth of bitcoin vanish in China|url=http://rt.com/business/banshee-bitcoin-vanish-china-601/%7Cpublisher=今日俄罗斯|accessdate=6 March 2015}}
  44. ^ 44.0 44.1 {{cite web|title=When bitcoins go bad: 4 stories of fraud, hacking, and digital currencies.|url=http://www.washingtonpost.com/blogs/the-switch/wp/2013/11/26/when-bitcoins-go-bad-4-stories-of-fraud-and-hacking/%7Cpublisher=华盛顿邮报|accessdate=6 March 2015}}
  45. ^ Mt. Gox Seeks Bankruptcy After $480 Million Bitcoin Loss, Carter Dougherty and Grace Huang, Bloomberg News, Feb. 28, 2014
  46. ^ {{cite news|last1=Perez|first1=Evan|title=CNN Justice Reporter|url=http://www.cnn.com/2015/03/30/politics/federal-agents-charged-with-stealing-bitcoin/%7Caccessdate=31 March 2015|agency=CNN}}
  47. ^ https://www.sec.gov/litigation/complaints/2015/comp23415.pdf
  48. ^ http://www.marketwired.com/press-release/gaw-miners-announces-plans-for-initial-coin-offering-1970991.htm
  49. ^ 49.0 49.1 {{Cite journal|title = The Silk Road, Bitcoins and the Global Prohibition Regime on the International Trade in Illicit Drugs: Can this Storm Be Weathered?|url = http://gjis.journals.yorku.ca/index.php/gjis/article/view/38935%7Cjournal = Glendon Journal of International Studies / Revue d'études internationales de Glendon|date = 2015-04-23|issn = 2291-3920|volume = 8|issue = 1-2|first = Reza|last = Raeesi}}
  50. ^ {{cite web|url=http://cryptocointalk.com/forum/178-scrypt-cryptocoins/%7Ctitle=CryptoCoinTalk.com - Discussing the World of Cryptocurrencies|work=CryptoCoinTalk|accessdate=24 February 2015}}
  51. ^ {{cite web | title = PPCoin: Peer-to-Peer Crypto-Currency with Proof-of-Stake | url = http://barkingshibes.com/wp-content/uploads/2014/02/ppcoin-paper.pdf | date = 19 August 2012 | author = Sunny King, Scott Nadal | accessdate = 12 May 2013}}
  52. ^ {{cite web |url=http://motherboard.vice.com/read/introducing-ledger-the-first-bitcoin-only-academic-journal |title=Introducing Ledger, the First Bitcoin-Only Academic Journal |author= |date= |work=Motherboard}}
  53. ^ {{cite web |url=http://www.coindesk.com/bitcoin-peer-reviewed-academic-journal-ledger-launches/ |title=Bitcoin Peer-Reviewed Academic Journal ‘Ledger’ Launches |author= |date= |work=CoinDesk}}
  54. ^ {{cite web |url=http://ledgerjournal.org/ojs/index.php/ledger/about/editorialPolicies#custom-0 |title=Editorial Policies |author= |date= |work=ledgerjournal.org}}
  55. ^ {{cite web|url=http://www.businessweek.com/articles/2013-12-05/bitcoins-volatility-problem-why-todays-sell-off-wont-be-the-last |title=Bitcoin's Volatility Problem: Why Today's Selloff Won't Be the Last |publisher=Businessweek |date=5 December 2013|accessdate=29 December 2013}}
  56. ^ {{cite web|url=http://www.zdnet.com/a-crypto-currency-primer-bitcoin-vs-litecoin-7000024301/ |title=A crypto-currency primer: Bitcoin vs. Litecoin |publisher=ZDNet |date=14 December 2013|accessdate=29 December 2013}}
  57. ^ {{cite web|title=Scamcoins|url=http://altcoins.com/scamcoins%7Cdate=August 2013}}
  58. ^ {{ cite news | title=Bitcoin's successors: from Litecoin to Freicoin and onwards | last=Bradbury | first=Danny | work=The Guardian | date=25 June 2013 | publisher=Guardian News and Media Limited | url=http://www.theguardian.com/technology/2013/jun/25/bitcoin-successors-litecoin-freicoin | accessdate=11 January 2014 }}
  59. ^ {{ cite news | title=Beyond bitcoin: Inside the cryptocurrency ecosystem | last=Morris | first=David Z | work=CNNMoney, a service of CNN, Fortune & Money | publisher=CNN | date=24 December 2013 | url=http://finance.fortune.cnn.com/tag/cryptocurrency/ | accessdate=11 January 2014 }}
  60. ^ {{cite web|url=http://arstechnica.com/business/2014/01/kanye-wests-lawyer-orders-coinye-to-cease-and-desist-just-before-launch/%7Ctitle=Kanye West’s lawyer orders "Coinye" to cease and desist just before launch|work=Ars Technica|accessdate=24 February 2015}}
  61. ^ {{cite web|last=Sidel |first=Robin |url=http://online.wsj.com/news/articles/SB10001424052702304202204579252850121034702 |title=Banks Mostly Avoid Providing Bitcoin Services. Lenders Don't Share Investors' Enthusiasm for the Virtual-Currency Craze |publisher=Online.wsj.com |date=22 December 2013|accessdate=29 December 2013}}
  62. ^ Keeping Your Cryptocurrency Safe, Center for a Stateless Society, 1 April 2014
  63. ^ The Future of Cryptocurrency, Investopedia, 10 September 2013
  64. ^ Want to make money off Bitcoin mining? Hint: Don't mine, The Week, 15 April 2013
  65. ^ Fundamental Analysis for Cryptocurrency, Wall Street Crypto, 10 January 2014
  66. ^ Cryptocurrency and Global Financial Security Panel at Georgetown Diplomacy Conf, MeetUp, 11 April 2014
  67. ^ Experiments in Cryptocurrency Sustainability, Let's Talk Bitcoin, March 2014
  68. ^ Four Reasons You Shouldn't Buy Bitcoins, Forbes, 3 April 2013
  69. ^ {{cite web|last=Schwartzkopff |first=Frances |url=http://www.bloomberg.com/news/2013-12-17/bitcoin-rules-drafted-in-denmark-as-regulator-warns-against-use.html |title=Bitcoins Spark Regulatory Crackdown as Denmark Drafts Rules |publisher=Bloomberg |date=17 December 2013|accessdate=29 December 2013}}
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