严重故障

中本聪原话中本聪June 14, 2010原帖 ↗

如果 SHA-256 被彻底攻破，我想我们可以就"麻烦开始之前哪条是诚实的区块链"达成共识，把它锁定，然后用一个新的哈希函数从那里继续。

If SHA-256 became completely broken, I think we could come to some agreement about what the honest block chain was before the trouble started, lock that in and continue from there with a new hash function.

如果哈希崩溃是渐进发生的，我们可以有序地过渡到新哈希。软件可以设定为在某个区块号之后启用新哈希。所有人都得在那之前升级。软件可以保存所有旧区块的新哈希，确保不能使用与旧哈希相同的不同区块。

If the hash breakdown came gradually, we could transition to a new hash in an orderly way. The software would be programmed to start using a new hash after a certain block number. Everyone would have to upgrade by that time. The software could save the new hash of all the old blocks to make sure a different block with the same old hash can't be used.