其他参与者原话DataWraith原帖 ↗容我插一句，问一下为什么会这样？在我看来，如果 Bitcoin 用公钥密码学来转移比特币的所有权，那么加入一条只有收款方可读的短消息应该是轻而易举的事。
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.
差不多，但还不完全准确。Bitcoin 用的是 EC-DSA，它只能做数字签名，不能加密。RSA 两者都能，但我没用它，因为它大出一个数量级，会不切实际。
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.
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