原始文献 / 邮件 / Bitcoin v0.1 released
Bitcoin v0.1 released
Cryptography Mailing List · 2009-01-25 15:47:10 UTC
Hal Finney 写道：
> > 垃圾邮件僵尸网络可以轻易
> > 烧穿按发送付费的邮件过滤器
> 如果工作量证明代币变得有用，尤其是如果它们变成货币，
> 机器将不再闲置。用户会期望自己的电脑
> 在为他们赚钱（假设收益大于运营成本）。
> 一台收益被僵尸网络偷走的电脑，
> 对它的主人来说会比今天更显眼，因此我们可能会
> 期待，在那样的世界里，用户会更努力地维护
> 自己的电脑，清除僵尸网络的感染。
如果工作量证明代币有价值，还有另一个因素会遏制垃圾邮件：人们会有盈利动机去建立大量虚假电子邮箱账号，从垃圾邮件中收割工作量证明代币。他们本质上是用自动化邮箱对垃圾邮件发送者进行"反向群发"——只收集他们的工作量证明、不读消息。虚假邮箱与真实人数之比可能高到让垃圾邮件无利可图。
这个过程本身就有潜力确立工作量证明代币的价值，因为没有僵尸网络的垃圾邮件发送者可以从收割者那里购买代币。虽然回购会暂时放行更多垃圾邮件，但这只会加速自我毁灭的循环——越来越多的收割者在剥削垃圾邮件发送者。
有趣的是，某个 e-gold 系统已经有了一种叫"dusting"（撒尘）的垃圾邮件形式。垃圾邮件发送者发送极少量的金粉，只为把垃圾消息塞进交易的备注字段。如果系统允许用户设置自己愿意接受的最低付款额，或至少设置附带消息的最低付款额，用户就能决定自己愿意收多少钱来接收垃圾邮件。
Satoshi Nakamoto
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英文原文
Hal Finney wrote:
> > * Spammer botnets could burn through pay-per-send email filters
> > trivially
> If POW tokens do become useful, and especially if they become money,
> machines will no longer sit idle. Users will expect their computers to
> be earning them money (assuming the reward is greater than the cost to
> operate). A computer whose earnings are being stolen by a botnet will
> be more noticeable to its owner than is the case today, hence we might
> expect that in that world, users will work harder to maintain their
> computers and clean them of botnet infestations.
Another factor that would mitigate spam if POW tokens have value:
there would be a profit motive for people to set up massive
quantities of fake e-mail accounts to harvest POW tokens from
spam. They'd essentially be reverse-spamming the spammers with
automated mailboxes that collect their POW and don't read the
message. The ratio of fake mailboxes to real people could become
too high for spam to be cost effective.
The process has the potential to establish the POW token's value
in the first place, since spammers that don't have a botnet could
buy tokens from harvesters. While the buying back would
temporarily let more spam through, it would only hasten the
self-defeating cycle leading to too many harvesters exploiting the
spammers.
Interestingly, one of the e-gold systems already has a form of
spam called "dusting". Spammers send a tiny amount of gold dust
in order to put a spam message in the transaction's comment field.
If the system let users configure the minimum payment they're
willing to receive, or at least the minimum that can have a
message with it, users could set how much they're willing to get
paid to receive spam.
Satoshi Nakamoto
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