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Author Topic: 几个可能进行了双花的地址  (Read 2659 times)
renxin
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June 14, 2014, 08:45:01 PM
 #21

双花和算力无关?我看这段有说明-----
没有算力的双花是受到上述限制的。但是,如果一个有可观算力的攻击者创建了一个双花交易,然后用其交易建立了比主区块链更长的区块,那么比特币其它节点会抛弃旧链,而转到这个新的更长的区块链上来。
发动那么大的算力实现双花,估计只有买航母才有受益吧,而且,等到网络确认后,双花也就无效了,确认也要不了多长时间

jl2012
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June 15, 2014, 03:46:47 AM
 #22


這種所謂雙花, 就像開空頭支票, 任何人都可以做到, 但銀行永遠不會兌現超過你的戶口結餘的支票.

礦工就是銀行, 他們不可以容許這種"雙花", 否則他們挖的礦也就無效, 也收不到那25BTC的回報

因此, 只要收款人等上幾個確認, 這種雙花是不可能成功的. 這正是需要等確認的原因, 正如你收到支票, 也需要等銀行確認

上面有人提到由礦工參與的雙花, 就是說通過更強的算力, 把已確認的交易變成沒確認, 這等於說是銀行作弊了. 可能嗎? 是有可能的, 但這從沒有發生過, 而且非常困難. 就算ghash擁有51%的算力, 他們在正常情況下也不能做到這種攻擊: 他們必須要完全停止正常挖礦, 改為秘密挖礦, 參與的礦工很快會發現有問題



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innocent93 (OP)
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June 15, 2014, 03:48:56 AM
 #23

其实我一直也没完全理解双花的原理,但总有人说双花成本很好不值得发动,但社区
为什么还这么惧怕51%
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June 15, 2014, 06:02:38 AM
 #24

其实我一直也没完全理解双花的原理,但总有人说双花成本很好不值得发动,但社区
为什么还这么惧怕51%

原始人為何俱怕打雷和日蝕? 為何你不怕? 無知就帶來俱怕.

我不是說算力過度集中不是問題, 但51%攻擊可以做到的也是很有限, 而且代價很大.

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a btc
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June 24, 2014, 09:37:31 PM
 #25

双花听起来很可怕,但是仍然不知道为什么会发生
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June 25, 2014, 02:19:33 AM
 #26

谢谢分享,大家自己保管好财产
Aliyah
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June 25, 2014, 03:45:07 AM
 #27

谁能解释一下呢
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June 25, 2014, 03:50:42 AM
 #28

0确认不应该叫双花,不然小白都被吓到了
linj79
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June 25, 2014, 03:53:12 AM
 #29

不可否认双花还是有可能的
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June 25, 2014, 04:04:10 AM
 #30

收藏,还是有有懂技术的来帮助分析下的
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June 25, 2014, 04:04:14 AM
 #31

不可否认双花还是有可能的
是的,有可能双花,但是不是那么容易的
zevlon
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June 25, 2014, 04:11:06 AM
 #32

0确认不应该叫双花,不然小白都被吓到了
这也是有可能的
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June 25, 2014, 05:16:02 AM
 #33

双花不是那么容易实现的
heavyrain
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June 25, 2014, 05:19:51 AM
 #34

双花不是那么容易实现的
非常对
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June 25, 2014, 05:20:14 AM
 #35

双花不是那么容易实现的
是的,即使算力超过51%,也不是很容易产生的
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June 26, 2014, 07:26:57 AM
 #36

那这几个地址要当心了

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baomuydtab34261
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June 26, 2014, 09:45:05 AM
 #37

有点深奥,我要求助百度了。
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June 26, 2014, 09:51:22 AM
 #38

51%是可能造成双花,是可能,不是一定
wzhung
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June 26, 2014, 09:52:55 AM
 #39

这个可不简单啊
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June 26, 2014, 09:55:34 AM
 #40

不是吧!又雙花  Angry
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