@Ryan_XxOo: 【比特黑众生相】吹空唱空不做空，讲理论道也稀松。我什么都不知道，就是感觉不可靠。老子当初没屯货，所以它是大泡沫。当初没买真后悔，只好现在耍耍嘴。你们赢钱我没赢，这是传销不公平。莫道安全太堪忧，土豪地址任您偷。说崩盘，道风险，三年之后来打脸。
创业《天使投资》在于创新,但要避险！比特币3年后走高或走低与我无关，因为我没做多，也无法做空： http://bbs.webplus.com/forum.php?mod=viewthread&tid=5668
我追捧创新，但在不懂不投 或不熟不做的前提下，我们要认清楚比特币最大风险：不是软件Bug,而是无法避免罪犯洗钱和匿名网购毒品枪械，各国ZF+银行体系会继续抵制！//@爱尚比特币： @唐
What can be done if Bitcoin is used for money laundering?
http://bitcoin.stackexchange.com ... or-money-laundering
If a criminal uses Bitcoin to launder his funds, can the bitcoin network stop him from using Bitcoin? Can we close his account?
Depends who "we" is.... – Thilo Sep 10 '13 at 2:51
Can we close a criminal's account?
No.
The owner of a bitcoin address can move all the money out of the address and then delete all copies of the key pair for the address. This would amount to closing the account, as the likelihood of someone having the same address in the future is infinitesimally small. However, moving bitcoin money out of an address requires either the owner's consent or legal pressure brought bear on the physical human being assumed to own the account. Criminals are adept at avoiding this sort of pressure.
Can we stop criminals using Bitcoin?
No.
This would require network consensus to collectively blacklist a bitcoin address. At current the community would be very unlikely to endorse such a protocol enhancement; as it could be used to tyrannise minority account holders.
If such a consensus was reached, locating criminal accounts would be difficult unless all residual mechanisms of bitcoin anonymity were also outlawed at the protocol level. Might as well rename the currency "1984".
But
Until bitcoin can be used in large volume to directly purchase food, shelter, safety and bling; criminals wanting to enjoy their ill-gotten gains have to change their bitcoins into a mundane currency like US dollars. Currency exchanges are already improving their recording and accountability to law enforcement officials. So the criminal will need to launder the money through plausible revenue sources before cashing out.
What can we do if Bitcoin is used for money laundering?
Not much
People or businesses could snub money that has come from a proven mixer or other aggregate wallets that don't comply to some auditing standard. But if bitcoin grows to any meaningful size, that is a lot of banking services or aggregate wallets to trace and enforce.
Considering how disposable each bitcoin address is, a botnet could simply create a million temporary accounts; feed the dirty money in at random; mix about like a mesh network of transactions following a plausible traffic pattern; and then spit out clean money.
In the long term, law enforcement will have powerful forensic tools to infer most cases of obvious money laundering. In turn, criminals with the connections and wealth will rent advanced money laundering methods as needed - like they already do in Vegas*.
* If you are suitably paranoid, you have to wonder how many bitcoin casinos have been established specifically to gestate money laundering operations.
It can't be closed, because there is no account. Likewise if he/she were using cash dollars for criminal purposes, it would not be possible to "close his wallet" as if it were some "account".
If a criminal uses Bitcoin to launder his funds, can the bitcoin network stop him from using Bitcoin? Can we close his account?
No one -- not a government, not the Bitcoin core developers -- can "close" a Bitcoin "account" because no central authority has unilateral control to do so. The closest it comes to "closing" an account is deleting the private key to an account, and such could only be done by forcing the holder to do so or tricking them into using a service that compromises their security by not really giving them control of their keys. Included in the latter would be government forcing intermediaries such as exchanges and services to comply and aid.
If someone is laundering money, it is likely necessary to catch them doing the actual illegal act of selling something illegally.
I have a third option: We get rid of Anti-money laundering (AML) regulations.
Money laundering has been criminalized in the United States since the Money Laundering Control Act of 1986. Perhaps it's time to reverse that decision.
This isn't too ridiculous, really. Money laundering is only illegal because it aids activities that actually are criminal. Murder with a kitchen knife is illegal but we didn't make all knives illegal! – Eyal Sep 12 '13 at 12:08
Whether bitcoin goes mainstream (and thus bitcoin owners haven't been wasting their time) depends on the perceived legitimacy of the currency. For governments and communities dealing with actual crime in meatspace, anti-money laundering compliance goes a long way towards reassuring the public that cryptocurrencies follow the democratic consensus of established laws. Whether a country's consensus on a given law & order solution is warranted or is an evidence-based intervention is another question entirely. – LateralFractal Sep 13 '13 at 0:49
Canada moves to prevent Bitcoin money-laundering
http://news.yahoo.com/canada-mov ... ring-180216941.html
AFP February 12, 2014 1:02 PM
Japanese authorities are probing the troubled MtGox bitcoin exchange after claims of a multi-million dollar theft from its digital vaults, as US prosecutors reportedly served a subpoena on the company
Ottawa (AFP) - Canada will bring in new anti-money laundering and anti-terrorist financing laws aimed at preventing abuses of virtual currencies such as Bitcoin, the finance minister confirmed Wednesday.
Asked about Bitcoin, a so-called "cryptocurrency" that is gaining in popularity both as an investment and as a way to make online payments, Jim Flaherty said: "We're going to have a look at it."
The Canadian government had announced its plan to tighten rules around the use of virtual currencies in the federal budget a day earlier, but no details were provided.
The budget document said Canada would "address emerging risks, including virtual currencies, such as Bitcoin, that threaten Canada's international leadership in the fight against money laundering and terrorist financing."
The proposed legislation follows recommendations in a March 2013 report by a senate banking committee.
Unlike other currencies, Bitcoin does not have the backing of a central bank or government.
Instead, units are generated by a complex computer algorithm designed by one or more anonymous people in 2009.
A report last month by the International Institute of Finance (IIF), which represents more than 450 banks and financial institutions, said Bitcoin's future as a broadly accepted exchange medium is limited.
It concluded that more regulation of Bitcoin exchanges and transactions could strengthen its legitimacy among consumers and ease regulators' doubts.
But for the moment, the IIF report said, Bitcoin faces significant resistance.
China and Russia recently cracked down on the use of Bitcoin.
In the United States, New York state signaled plans to become the first jurisdiction to regulate businesses that handle virtual currencies.
Bitcoin's value meanwhile plunged this week after attacks on major exchanges, forcing three to suspend withdrawals.
A technical glitch apparently allowed fraudsters to flood exchanges with duplicate withdrawal requests, allowing them to convert the same Bitcoins twice into traditional currencies.
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