回复：新手测试——有人想花 1 美元买一张图片吗？
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是的，这是技术限制。通过比特币地址发送会把交易送入网络，接收方会从网络中发现它。你不会直接连接对方，对方当时也不必在线。
我非常想找到某种方式来加入一条短消息，但问题是，全世界都能看到这条消息。无论你多么不断提醒人们这条消息完全不具备隐私性，它都可能成为一场等待发生的意外。
遗憾的是，ECDSA 只能生成签名，不能加密消息，而我们需要 ECDSA 较小的体积。RSA 可以加密消息，但它比 ECDSA 大许多倍。
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Yes, it's a technical limitation. Sending by bitcoin address enters the transaction into the network and the recipient discovers it from the network. You don't connect directly with them and they don't have to be online at the time.
I very much wanted to find some way to include a short message, but the problem is, the whole world would be able to see the message. As much as you may keep reminding people that the message is completely non-private, it would be an accident waiting to happen.
Unfortunately, ECDSA can only sign signatures, it can't encrypt messages, and we need the small size of ECDSA. RSA can encrypt messages, but it's many times bigger than ECDSA.