原始文献 / 论坛帖 / Re: Where is the separate discussion devoted to possible Bitcoin weaknesses.
Re: Where is the separate discussion devoted to possible Bitcoin weaknesses.
Bitcointalk · 2010-08-11 22:40:25 UTC
不用搞成这么 breaking 的改动。新节点可以长期接受旧交易，等大多数节点都升级了再开始拒绝没有 PoW 的交易。或者，永远接受旧交易，但每个时间段只限量。
交易加 PoW 我想过很多次，但最后总觉得 0.01 手续费本质上差不多、而且更好。0.01 基本就是工作量证明，只是不浪费。但如果问题是验证海量交易太慢，那 PoW 倒是能验得更快。
更 general 的 umbrella 式局部解法是：实现一个检测"收到的块数异常下跌"的机制。这样攻击者要从 DoS 里获利，还是得占全网相当大一部分算力。
引用自：gavinandresen，2010 年 8 月 11 日 04:10:56 PM（https://bitcointalk.org/index.php?topic=788.msg8761#msg8761）
比特币的 p2p 网络会受到各种拒绝服务攻击。
行，我说出来了。
+1
这时候搞演示测试，只能证明我们已经知道的事，还会把开发时间从加固系统挪去线上救火。
英文原文
It doesn't have to be such a breaking change. New nodes could accept old transactions for a long time until most nodes have already upgraded before starting to refuse transactions without PoW. Or, they could always accept old transactions, but only a limited number per time period.
I've thought about PoW on transactions many times, but usually I end up thinking a 0.01 transaction fee is essentially similar and better. 0.01 is basically a proof of work, but not wasted. But if the problem is validating loads of transactions, then PoW could be checked faster.
A more general umbrella partial solution would be to implement the idea where an unlikely dropoff in blocks received is detected. Then an attacker would still need a substantial portion of the network's power to benefit from a DoS attack.
Quote from: gavinandresen on August 11, 2010, 04:10:56 PM（https://bitcointalk.org/index.php?topic=788.msg8761#msg8761）Bitcoin's p2p network is subject to various kinds of denial of service attacks.
There, I said it.
+1
Any demonstration tests at this point would only show what we already know, and divert dev time from strengthening the system to operational fire fighting.