原始文献 / 论坛帖 / Re: A newb's test - anyone want to buy a picture for $1?
Re: A newb's test - anyone want to buy a picture for $1?
Bitcointalk · 2010-01-28 01:01:48 UTC
是的，这是技术限制。通过比特币地址发送，是把交易记进网络，接收方从网络上发现它。你不直接跟对方连接，对方当时也不必在线。
我很想找办法附上一段短消息，但问题是，全世界都能看到这条消息。你再怎么提醒大家消息完全没有隐私可言，都难免出事。
不幸的是，ECDSA 只能签名，不能加密消息，而我们需要 ECDSA 的小体积。RSA 能加密消息，但比 ECDSA 大很多倍。
英文原文
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.