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智能合约游戏之殇——Dice2win安全分析
系列文章: 《智能合约游戏之殇——类 Fomo3D 攻击分析》 《智能合约游戏之殇——God.Game 事件分析》
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EOS DApp 充值“假通知”漏洞分析
15日下午,知名 EOS DApp EOSBet 出现漏洞被盗约 14 万个 EOS,慢雾安全团队第一时间应急分析漏洞原因。鉴于漏洞细节已经被公开,我们决定直接披露该漏洞原因。
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科普 | 以太坊到底是啥?
虽然“比特币”和“以太坊”这两个术语通常成对出现,但是它们之间实际上有着天壤之别。以太坊和比特币之间的唯一共同之处在于,它们都是在区块链上运行的加密资产。 以太坊不像比特币那样只是一种加密货币,它还存在其它特征,使其成为了一个巨大的分布式计算机。 要想理解以太坊,就必须理解区块链的工作方式。如果你已经理解了以太坊,或是已经读过了我写的《关于如何理解区块链的终极指南》(编者按:中译见文末《区块链是什么鬼》链接),可直接跳转至下一节。
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引介 | 剖析以太坊的存储成本
将数据永久存储在以太坊中是极其昂贵的。使用以太坊存储数据没有任何意义。以太坊应该只存储正常运行所需要的数据,并将数据存储委托给其他解决方案:如 Swarm、Filecoin、IPFS 等等。一个不错的主意是将默克尔树的根哈希值作为数据篡改证明存储在外部服务器中。 此外,ETH 价格不可预知,可能的快速增长会导致操作的开销(以法定货币为单位)增长到更高的级别。如果发生这种情况,矿工必须调整单位 Gas 的最低 ETH 价格,以重新调整开销。 通过分析智能合约的 Gas 开销来控制操作的成本是非常重要的
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TheDAO悲剧重演,SpankChain重入漏洞分析
在10月8日,区块链项目方SpankChain在medium上发表了一篇文章, 并表明其受到了攻击,导致损失了160多个ETH和一些Token,这次攻击事件,相对来说损失金额是较小的,约4万美元,不过值得一提的是:这次攻击事件的起因与2016年闹得沸沸扬扬的TheDAO事件如出一辙!一共被盗走300多万ETH,更为严重的是还间接导致了以太坊硬分叉...
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以太坊合约审计 CheckList 之“以太坊智能合约编码设计问题”影响分析报告
以太坊智能合约是以太坊概念中非常重要的一个概念,以太坊实现了基于solidity语言的以太坊虚拟机(Ethereum Virtual Machine),它允许用户在链上部署智能合约代码,通过智能合约可以完成人们想要的合约。
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EOS骑士
EOS主网首款区块链RPG游戏
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333 ETH
投资者只要持续持有,每天就会有“3.33%”的回报。
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云斗龙
可爱的宠物龙收藏游戏
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区块链炉石
类似炉石传说去中心化的区块链卡牌游戏
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ForkDelta
去中心化的ERC20代币交易所
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EOSBet
商业规模的智能赌场
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以太镇
在这个小镇中投资抓钱,让你的英雄变得越来越强大
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谜恋猫
收集和繁殖数字猫,每一只猫都是独一无二的
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IDEX
通过智能合约来交易ERC20代币的去中心化交易所
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Ethereum is an open-source, public, blockchain-based distributed computing platform and operating system featuring smart contract (scripting) functionality. It supports a modified version of Nakamoto consensus via transaction-based state transitions. Ether is a cryptocurrency whose blockchain is generated by the Ethereum platform. Ether can be transferred between accounts and used to compensate participant mining nodes for computations performed.[4] Ethereum provides a decentralized Turing-complete virtual machine, the Ethereum Virtual Machine (EVM), which can execute scripts using an international network of public nodes. "Gas", an internal transaction pricing mechanism, is used to mitigate spam and allocate resources on the network. Ethereum was proposed in late 2013 by Vitalik Buterin, a cryptocurrency researcher and programmer. Development was funded by an online crowdsale that took place between July and August 2014.The system went live on 30 July 2015, with 11.9 million coins "premined" for the crowdsale.This accounts for about 13 percent of the total circulating supply. In 2016, as a result of the collapse of The DAO project, Ethereum was split into two separate blockchains – the new separate version became Ethereum (ETH), and the original continued as Ethereum Classic (ETC). The value of the Ethereum currency grew over 13,000 percent in 2017. 
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智能合约