回复：我们接受比特币
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引用 DataWraith 于 2010 年 5 月 19 日下午 07:52:42 的帖子
我能否插一句，问问为什么会这样？在我看来，如果比特币使用公钥密码学来转移币的所有权，那么附带一条只有接收者能够读取的短消息，应该是轻而易举的事。
差不多，但还不完全是。比特币使用 EC-DSA，它只能进行数字签名，不能加密。RSA 两者都能做，但我没有使用它，因为它的体积要大一个数量级，会很不实用。
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Quote from: DataWraith on May 19, 2010, 07:52:42 PM
Can I just butt in with a question on why that is? To me it seems that if Bitcoin uses public-key cryptography to transfer ownership of the coins, it should be a trivial matter to include a short message that is only readable by the recipient.
Almost but not quite. Bitcoin uses EC-DSA, which can only do digital signing, not encryption. RSA can do both, but I didn't use it because it's an order of magnitude bigger and would have been impractical.