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A cryptocurrency tumbler or cryptocurrency mixing service is a service offered to mix potentially identifiable or 'tainted' cryptocurrency funds with others, with the intention of confusing the trail back to the fund's original source. Tumblers have arisen to improve the anonymity of popular cryptocurrencies, usually bitcoin, since they provide a public ledger of all transactions.〔(【引用サイトリンク】url=http://bitcoin-mixing-services.com/analysis.html )〕 In traditional financial systems, the equivalent would be moving funds through banks located in countries with strict bank-secrecy laws, such as the Cayman Islands, the Bahamas and Panama offshore banks. Tumblers take a small percentage transaction fee of the total coins mixed to turn a profit, typically 1-3%.〔 Mixing helps protect privacy, but can also be used for money laundering by mixing illegally obtained funds. Mixing large amounts of money may be illegal, being in violation of anti-structuring laws. Financial crimes author Jeffrey Robinson has suggested tumblers should be criminalized due their potential use in illegal activities, specifically funding terrorism, however a report from the CTC suggests such use in terrorism related activities is 'relatively limited'. There has been at least one incident where an exchange has blacklisted "tainted" deposits descending from stolen bitcoins.〔(Mt Gox thinks it's the Fed. Freezes acc based on "tainted" coins. )〕 Manual or lightly automated mixing methods can make detection of taint more difficult unless the exchange follows the trail,〔(Blockchain-based betting services function as mixing services? )〕 but this approach does protect privacy like a true mixing service would. The existence of tumblers has made the anonymous use of darknet markets easier and that of law enforcement harder. ==Alternative implementations== Newer and proposed coin implementations such as Dash - (formally Darkcoin), Zerocoin and Cloakcoin have built in the mixing services as a part of their blockchain network. The Dark Wallet client software for bitcoin was built to natively mix transactions between users to achieve the same effect without relying on a centralised service. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Cryptocurrency tumbler」の詳細全文を読む スポンサード リンク
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