https://ruby-china.org/cr4fun en-us <p>一、原理 上一个区块的 hash 和下一个区块的“上一个区块 hash”能对上，就意味着，数据没有被篡改。 <img src="https://l.ruby-china.com/photo/2018/574e785b-b634-4c08-99f6-1f6573da50f9.svg!large" title="" alt=""> 如果 hash 对不上，就意味着数据被篡改了。 <img src="https://l.ruby-china.com/photo/2018/6fa4bd99-e8d1-4b03-a122-860f3d546fef.svg!large" title="" alt=""></p> <p>二、演示</p> <ol> <li>创建一个数据库</li> </ol> <p><img src="https://l.ruby-china.com/photo/2018/cebb3f49-4bde-4f48-b569-985e10194e9d.gif" title="" alt=""></p> <p>2.创建一个创世区块</p> <p><img src="https://l.ruby-china.com/photo/2018/fa1a9f4c-49c3-4513-ad3a-fcf927976eb7.gif" title="" alt=""></p> <ol> <li>添加区块</li> </ol> <p><img src="https://l.ruby-china.com/photo/2018/4099a2d5-a69a-464e-8058-3a3a5548c841.gif" title="" alt=""></p> <ol> <li>获得最后区块</li> </ol> <p><img src="https://l.ruby-china.com/photo/2018/d4106f14-1676-4954-8fed-267cd7836485.gif" title="" alt=""></p> <ol> <li>获得全部区块</li> </ol> <p><img src="https://l.ruby-china.com/photo/2018/4d1f7101-c2ef-4b36-bc2a-90e5d6960551.gif" title="" alt=""></p> <ol> <li>验证</li> </ol> <p><img src="https://l.ruby-china.com/photo/2018/d52b5f78-a182-4b9a-a93f-eafecae6b379.gif" title="" alt=""></p> <ol> <li>手动篡改数据，发现验证不通过</li> </ol> <p><img src="https://l.ruby-china.com/photo/2018/2c56435d-cc14-4c2b-b0de-0b94360fdcd3.gif" title="" alt=""></p> <ol> <li>改回数据，通过验证</li> </ol> <p><img src="https://l.ruby-china.com/photo/2018/f5edae79-0b79-48b6-bcf3-880b81d0783b.gif" title="" alt=""></p> <p>三、项目地址：</p> <p>github <a href="https://github.com/rubybook/blockchain" rel="nofollow" target="_blank">https://github.com/rubybook/blockchain</a></p> <p>四、后续说明</p> <p>这个项目是为了做区块链教学的，目前还没有实现节点同步、共识、加密转账等。后续会逐步添加。</p> cr4fun Fri, 09 Nov 2018 14:13:25 +0800 https://ruby-china.org/topics/37746 https://ruby-china.org/topics/37746