SN-10043 附来源、原文与上下文。
Martien van Steenbergen 写道：
Martien van Steenbergen wrote:
引用的来信Martien van Steenbergen来源 ↗很有意思。这与 David Chaum 的匿名数字货币相似吗？他的构想能保证货币匿名，除非规则被破坏，也就是同一笔钱被花费多次。一旦出现这种情况，“造假者”就会立即被公开揭露。
Very interesting. Is this akin to David Chaum's anonymous digital money? His concept makes sure money is anonymous unless it is compromised, i.e. the same money spent more than once. As soon as it's compromised, the ‘counterfeiter’ is immediately publicly exposed.
相似之处在于，币都使用数字签名；不同之处在于保护隐私和防止双重支付的方法。比特币的收款人可以检查，这是否是第一次花费，第二次花费不会被接受。它没有一种离线模式，先允许双重支付，事后再揪出行为人并公开羞辱，因为那会要求参与者具有身份。
It's similar in that it uses digital signatures for coins, but different in the approach to privacy and preventing double-spending. The recipient of a Bitcoin payment is able to check whether it is the first spend or not, and second-spends are not accepted. There isn't an off-line mode where double-spenders are caught and shamed after the fact, because that would require participants to have identities.
为保护隐私，密钥对只使用一次，每笔交易都使用新的密钥对。谁持有一个币的私钥，谁就是它的所有者。
To protect privacy, key pairs are used only once, with a new one for every transaction. The owner of a coin is just whoever has its private key.
当然，最大的区别是没有中央服务器。这是 Chaum 式系统的致命弱点：中央公司关门，货币也就停止运作。
Of course, the biggest difference is the lack of a central server. That was the Achilles heel of Chaumian systems; when the central company shut down, so did the currency.
引用的来信Martien van Steenbergen来源 ↗另外，比特币的货币供应量是否有限（因而必须管理）？还是说，货币恰好在交易时创建？
Also, in bitcoin, is there a limited supply of money (that must be managed)? Or is money created exaclty at the moment of transaction?
货币供应量有限。流通量将是 21,000,000 个币。交易只转移所有权。
There is a limited supply of money. Circulation will be 21,000,000 coins. Transactions only transfer ownership.
谢谢你的问题，
Thank you for your questions,
Satoshi
Satoshi
