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【转】比特币现金(BCC)会发生51%算力攻击吗?
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Topic: 【转】比特币现金(BCC)会发生51%算力攻击吗? (Read 256 times)
RicardoMLu
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【转】比特币现金(BCC)会发生51%算力攻击吗?
August 16, 2017, 09:26:23 AM
#1
理论上,基于区块链技术开发的所有POW币都是存在51%算力攻击风险,BCC作为比特币孪生兄弟也不例外,依旧是存在51%攻击的风险。51%攻击曾被认为是比特币最大的风险,一些矿池也曾一度占到全网算力51%以上,但51%攻击并没有发生,也只是停留在理论阶段。
比特币现金(BCC)是由一个庞大的大区块支持者构成的社区支撑的去中心化数字货币,在8月1日20:00开始挖矿,在和主链分离以后走向了独立发展的道路。比特币现金继承了中本聪大区块的思想,删除了隔离验证(SegWit),取消了1M区块大小的限制,坚持的是链上扩容技术路线。
BCC是长达三年之久的扩容之争的产物和延续,以core开发组为代表的小区块支持者和大区块支持者之间的战争一直没有结束,纽约共识只是一种妥协方案,core开发组已经公开反对。对于BCC更是欲除之而后快,曾不止一次的对BCC发起延展性攻击,在BCC难度调整的临界点切换大量算力阻止挖矿难度降低,从而阻止矿工的进入,威胁BCC网络的稳定。甚至,扬言要对BCC网络发起51%算力攻击,杀死BCC。
不过,实践证明BCC的诞生不是偶然,是市场和用户的选择,拥有强大的社区支持。BCC不会因为某些利益团体的个人意志而失败,恶意矿工也只能延缓BCC网络的稳定发展,阻止不了BCC发展的大趋势。恶意矿工发起51%攻击对BCC产生不了致命的威胁,更多的是为了引起市场对BCC的恐慌情绪。
目前,BCC的算力约占到比特币算力的5%-10%左右,目前几乎没有单个矿工拥有超过这5%-10%的算力,除非是一些比特币矿池把算力切换过来,发起对BCC的51%算力攻击,但BCC一旦受到算力威胁,支持大区块的矿工也会把算力切换过来对抗恶意矿工。另外,发起51%算力攻击是一项高技术含量的工作,操作难度是非常大的,不是随随便便就能发起的。
51%算力攻击的成本和收益也是不对等的,51%算力攻击能做到的也只不过是交易双花。目前,全球主流的交易平台都已经实行了严格的实名认证,及时变现也是一个很大的难题。无利可图,矿工是不会轻易发起攻击的,只能通过不停的在挖矿难度临界点切换大量算力,阻止BCC挖矿难度的降低,让诚实的矿工挖矿无利可图,最终导致BCC矿工的退出,让BCC自生自灭。
当然,也不排除一些恶意的矿工联合起来对BCC发起51%算力攻击,这在理论上是行得通的。不过,51%攻击只会给BCC网络造成一定程度上的混乱,但不会给BCC网络带来致命的打击。因为,这些人不可能会对BCC网络发起连续的51%算力攻击,只会在人们不知不觉中发起一次,引起BCC社区的恐慌情绪。还有就是发起51%算力攻击的人可能会因此变得声名狼藉,变成社区内的过街老鼠。
big21313
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Re: 【转】比特币现金(BCC)会发生51%算力攻击吗?
August 18, 2017, 09:01:49 AM
#2
BCC把保留了中本聪比特币原来的简单特征,就只针对法币超发,要做数字黄金这一简单的目标。给比特币的升级做了一个风险备份版本。
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【转】比特币现金(BCC)会发生51%算力攻击吗?
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