{"id":2371,"date":"2017-12-29T03:11:15","date_gmt":"2017-12-29T03:11:15","guid":{"rendered":"https:\/\/www.inforsec.org\/wp\/?p=2371"},"modified":"2017-12-29T03:11:15","modified_gmt":"2017-12-29T03:11:15","slug":"flashguard-%e5%88%a9%e7%94%a8%e5%9b%ba%e6%80%81%e5%ad%98%e5%82%a8%e7%9a%84%e7%a1%ac%e4%bb%b6%e7%89%b9%e6%80%a7-%e5%af%b9%e6%8a%97%e5%8b%92%e7%b4%a2%e8%bd%af%e4%bb%b6","status":"publish","type":"post","link":"http:\/\/202.112.238.40\/wp\/?p=2371","title":{"rendered":"FlashGuard: \u5229\u7528\u56fa\u6001\u5b58\u50a8\u7684\u786c\u4ef6\u7279\u6027 \u5bf9\u6297\u52d2\u7d22\u8f6f\u4ef6"},"content":{"rendered":"

\u4f5c\u8005\uff1aJun Xu (\u5f90\u519b) \u00a0 Jian Huang<\/p>\n

\u8fd1\u5e74\u6765\uff0c\u4e00\u79cd\u79f0\u4e3aransomware\u7684\u6076\u610f\u8f6f\u4ef6\u5f00\u59cb\u5728\u5168\u7403\u8303\u56f4\u5185\u8513\u5ef6\uff0c\u4e25\u91cd\u5371\u5bb3\u7740\u5927\u91cf\u7684\u8ba1\u7b97\u673a\u7cfb\u7edf\u3002\u6bd4\u5982\uff0cWannaCry\u75c5\u6bd2\u57282017\u5e745\u6708\u53d1\u751f\uff0c\u5728\u4e00\u4e2a\u661f\u671f\u4e4b\u5185\u5df2\u7ecf\u5f71\u54cd\u4e86150\u4e2a\u56fd\u5bb6\u7684230,000\u53f0\u7535\u8111\u3002\u00a0\u8fd9\u4e9b\u88ab\u653b\u51fb\u7684\u7535\u8111\u6709\u5f88\u5927\u4e00\u90e8\u5206\u6765\u81ea\u4e8e\u653f\u5e9c\u90e8\u95e8\uff0c\u5b66\u6821\u548c\u533b\u9662\u7b49\u673a\u6784\u3002\u4e0e\u9488\u5bf9\u7834\u574f\u8ba1\u7b97\u673a\u7cfb\u7edf\u548c\u7a83\u53d6\u79c1\u5bc6\u4fe1\u606f\u7684\u4f20\u7edf\u75c5\u6bd2\u4e0d\u540c, ransomware\u6697\u5730\u91cc\u52a0\u5bc6\u7528\u6237\u6587\u4ef6\uff0c\u8981\u6c42\u7528\u6237\u652f\u4ed8\u8d4e\u91d1\u624d\u80fd\u6062\u590d\u6587\u4ef6\u3002ransomware\u7684\u884c\u4e3a\u548c\u6b63\u5e38\u7684\u8f6f\u4ef6\u5e76\u6ca1\u6709\u663e\u8457\u4e0d\u540c\uff0c\u5f88\u5bb9\u6613\u7ed5\u8fc7\u68c0\u6d4b\u9632\u5fa1\u3002\u8fd9\u4f7f\u5f97\u8fd9\u7c7b\u75c5\u6bd2\u8d8a\u6765\u8d8a\u53d7\u5230\u653b\u51fb\u8005\u7684\u6b22\u8fce\u3002\u6839\u636eIBM\u7684\u6570\u636e\uff0c2016\u5e74\u53d7\u5230ransomware\u653b\u51fb\u7684\u7528\u6237\u6570\u91cf\u548c\u7528\u6237\u652f\u4ed8\u8d4e\u91d1\u7684\u91d1\u989d\u90fd\u6bd42015\u5e74\u589e\u957f\u4e86\u6570\u5341\u500d\u3002<\/p>\n

<\/p>\n

\u9488\u5bf9ransomware, \u76ee\u524d\u5df2\u7ecf\u6709\u4e00\u4e9b\u76f8\u5173\u5bf9\u6297\u5de5\u4f5c\u3002\u8fd9\u4e9b\u5de5\u4f5c\u4e3b\u8981\u805a\u7126\u4e8e\u8bbe\u8ba1\u68c0\u6d4b\u7cfb\u7edf\u3002\u8fd9\u4e9b\u7cfb\u7edf\u901a\u8fc7\u76d1\u6d4bransomware\u8fd0\u884c\u65f6\u7684\u884c\u4e3a\u7279\u5f81\u53d1\u73b0\u75c5\u6bd2\u3002\u7136\u800c\uff0c\u5f53ransomware\u88ab\u68c0\u6d4b\u5230\u65f6\uff0c\u4e00\u4e9b\u7528\u6237\u6587\u4ef6\u53ef\u80fd\u5df2\u7ecf\u88ab\u75c5\u6bd2\u52a0\u5bc6\uff0c\u6700\u7ec8\u7528\u6237\u8fd8\u662f\u8981\u652f\u4ed8\u8d4e\u91d1\u624d\u80fd\u6062\u590d\u8fd9\u4e9b\u6587\u4ef6\u3002\u8ba9\u60c5\u51b5\u53d8\u7684\u66f4\u52a0\u7cdf\u7cd5\u7684\u662f\u5927\u91cfransomware\u4f1a\u5c1d\u8bd5\u83b7\u5f97\u7ba1\u7406\u5458\u6743\u9650\uff0c\u4ee5\u7ec8\u6b62\u8f6f\u4ef6\u5c42\u6b21\u7684\u9632\u5fa1\u7cfb\u7edf\u3002<\/p>\n

\u5b9a\u671f\u5907\u4efd\u662f\u5bf9\u6297ransomware\u7684\u53e6\u5916\u4e00\u79cd\u601d\u8def\u3002\u4f46\u662f\u5907\u4efd\u4f1a\u5f15\u8d77\u5b58\u50a8\u5f00\u9500\uff0c\u5e76\u4e14ransomware\u4f9d\u7136\u53ef\u4ee5\u51ed\u501f\u7ba1\u7406\u5458\u6743\u9650\u505c\u6b62\u6216\u8005\u9500\u6bc1\u5907\u4efd\u3002\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u63d0\u51fa\u4e86FlashGuard [1]\uff0c\u4e00\u4e2a\u53ef\u4ee5\u5bf9\u6297ransomware\u7684SSD\u3002FlashGuard\u5728SSD\u7684\u56fa\u4ef6\u5185\u90e8\u642d\u8f7d\u6062\u590d\u7cfb\u7edf\uff0c\u80fd\u591f\u5728\u4e0d\u9700\u8981\u989d\u5916\u5907\u4efd\u7684\u60c5\u51b5\u4e0b\uff0c\u5feb\u901f\u6062\u590d\u88abransomware\u7834\u574f\u7684\u6570\u636e\u3002<\/p>\n

FlashGuard\u5229\u7528\u73b0\u5728SSD\u5df2\u6709\u7684out-of-place\u66f4\u65b0\u673a\u5236\u3002\u8fd9\u4e2a\u673a\u5236\u539f\u672c\u662f\u4e3a\u4e86\u6d88\u9664SSD\u4e2d\u91cd\u5199\u6240\u5e26\u6765\u7684\u5ef6\u8fdf — \u5f53\u4e00\u4e2a\u786c\u76d8\u9875\u9762\u88ab\u66f4\u65b0\u65f6\uff0cSSD\u5fc5\u987b\u5148\u64e6\u9664\u5bf9\u5e94\u7269\u7406\u5757\uff0c\u4f46\u662f\u8fd9\u4e2a\u64e6\u5199\u7684\u8fc7\u7a0b\u975e\u5e38\u8017\u65f6\uff0c\u56e0\u6b64SSD\u91c7\u7528out-of-place\u673a\u5236\u628a\u91cd\u5199\u7684\u6570\u636e\u5199\u5728\u5df2\u7ecf\u88ab\u64e6\u9664\u7684\u7269\u7406\u9875\u9762\u4e0a\uff0c\u90a3\u8fd9\u4e2a\u9875\u7684\u539f\u59cb\u5907\u4efd\u4f9d\u7136\u4f1a\u4fdd\u5b58\u4e8eSSD\u4e2d\u3002\u4e00\u6bb5\u65f6\u95f4\u4e4b\u540e\uff0cSSD\u901a\u8fc7\u5783\u573e\u56de\u6536\u673a\u5236\u6765\u56de\u6536\u5b58\u50a8\u7740\u539f\u59cb\u6570\u636e\u7684\u5931\u6548\u9875\u3002FlashGuard\u4fee\u6539SSD\u7684\u5783\u573e\u56de\u6536\u673a\u5236\uff0c\u4f7f\u5f97\u5f53ransomware\u52a0\u5bc6\u6587\u4ef6\u65f6\uff0c\u6570\u636e\u7684\u539f\u59cb\u5907\u4efd\u4f9d\u65e7\u4fdd\u5b58\u5728SSD\u4e2d\u5e76\u4e14\u4e0d\u4f1a\u88ab\u56de\u6536\u3002\u901a\u8fc7\u5bf91447\u4e2aransomware\u6837\u672c\u7684\u5b9e\u9a8c\uff0c\u6211\u4eec\u53d1\u73b0FlashGuard\u80fd\u591f\u6709\u6548\u6062\u590d\u88ab\u52a0\u5bc6\u6587\u4ef6\u3002\u53e6\u5916\u672c\u6587\u8fd8\u8bba\u8bc1\u4e86FlashGuard\u5bf9SSD\u6027\u80fd\u548c\u751f\u547d\u5468\u671f\u7684\u5f71\u54cd\u53ef\u4ee5\u5ffd\u7565\u3002<\/p>\n

FlashGuard\u7684\u8bbe\u8ba1\u57fa\u4e8e\u6211\u4eec\u5bf9\u4e8e\u5927\u91cfransomware\u7684\u8c03\u7814\u3002\u6211\u4eec\u7684\u8c03\u7814\u4e3b\u8981\u5173\u6ce8\u4e8eransomware\u52a0\u5bc6\u6240\u9700\u65f6\u95f4\u548c\u5bf9\u4e8e\u5907\u4efd\u7684\u9500\u6bc1\u3002\u6211\u4eec\u4eceVirusTotal\u6536\u96c6\u4e861477\u4e2a\u52d2\u7d22\u75c5\u6bd2\u5b9e\u4f8b\uff0c\u5e76\u4e14\u6839\u636e\u5b83\u4eec\u7684\u7684\u52d2\u7d22\u6d88\u606f\u5c06\u5b83\u4eec\u5206\u621013\u7c7b\u3002\u6211\u4eec\u5728\u865a\u62df\u673a\u5185\u6a21\u62df\u4e86\u4e00\u53f0\u6b63\u5e38\u7528\u6237\u7684\u6587\u4ef6\u7cfb\u7edf\uff0c\u5176\u4e2d\u5305\u542b\u4e86\u6765\u81ea\u4e8e\u8d85\u8fc7\u5341\u516d\u4e2d\u7c7b\u578b\u76849876\u4e2a\u6587\u4ef6\u3002\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0c\u5728\u52a8\u6001\u8fd0\u884c\u6bcf\u4e00\u4e2a\u6837\u672c\u7684\u65f6\u5019\uff0c\u6211\u4eec\u81ea\u52a8\u8d4b\u4e88\u4e86\u6837\u672c\u7ba1\u7406\u5458\u6743\u9650\uff0c\u4ee5\u66f4\u5927\u9650\u5ea6\u5730\u66b4\u6f0f\u6837\u672c\u7684\u884c\u4e3a\u3002\u6211\u4eec\u5c06\u8c03\u7814\u7684\u7ed3\u679c\u603b\u7ed3\u4e8e\u88681\u4e2d\u3002<\/p>\n

\"\"<\/p>\n

\u88681: \u6211\u4eec\u8c03\u7814\u4e2d\u4f7f\u7528\u7684\u6837\u672c\u7c7b\u578b\u3002\u6b64\u8868\u5c55\u793a\u4e86\u8fd9\u4e9b\u6837\u672c\u9488\u5bf9\u7684\u6587\u4ef6\u7c7b\u578b\uff0c\u5b8c\u6210\u52a0\u5bc6\u6240\u9700\u8981\u7684\u65f6\u95f4\uff0c\u4ee5\u53ca\u662f\u5426\u4f1a\u6467\u6bc1\u5907\u4efd\u6570\u636e\u3002<\/p>\n

\u6211\u4eec\u53d1\u73b0\uff0cransomware\u901a\u5e38\u5728\u52a0\u5bc6\u5b8c\u6210\u540e\u7acb\u5373\u663e\u793a\u52d2\u7d22\u6d88\u606f\uff08\u6709\u4e00\u4e9b\u6837\u672c\u751a\u81f3\u5728\u5b8c\u6210\u52a0\u5bc6\u524d\u5c31\u663e\u793a\u4e86\u52d2\u7d22\u4fe1\u4fe1\u606f\uff09\u3002\u670910\u7c7b\u75c5\u6bd2\u5b8c\u6210\u52a0\u5bc6\u6240\u9700\u7684\u65f6\u95f4\u5c11\u4e8e\u4e00\u5c0f\u65f6\uff0c\u67d0\u4e9b\u6837\u672c\u751a\u81f3\u4e0d\u523020\u5206\u949f\u5c31\u5b8c\u6210\u4e86\u52a0\u5bc6\u3002\u7279\u5b9a\u7c7b\u578b\u7684ransomware\u53ea\u52a0\u5bc6\u5c0f\u6587\u4ef6\u6216\u8005\u7279\u5b9a\u6269\u5c55\u540d\u7684\u6587\u4ef6\uff0c\u6bd4\u5982JigSaw\u53ea\u52a0\u5bc6\u5c0f\u4e8e10 MB\u7684\u6587\u4ef6\u3002\u6211\u4eec\u8fd8\u53d1\u73b0\u67098\u7c7b\u52d2\u7d22\u75c5\u6bd2\u4f1a\u9500\u6bc1\u5907\u4efd\u6587\u4ef6\u3002\u6ce8\u610f\u524d\u9762\u6211\u4eec\u63d0\u5230\u8fc7\uff0c\u6211\u4eec\u8d4b\u4e88\u4e86\u52d2\u7d22\u75c5\u6bd2\u7ba1\u7406\u5458\u6743\u9650\uff0c\u6240\u4ee5\u52d2\u7d22\u75c5\u6bd2\u53ef\u4ee5\u5220\u9664\u5907\u4efd\u3002\u5728\u771f\u5b9e\u573a\u666f\u4e2d\uff0c\u5982\u679cransomware\u6ca1\u6709\u5f97\u5230\u76f8\u5e94\u6743\u9650\uff0c\u5b83\u4eec\u4f1a\u8bbe\u6cd5\u7ed5\u8fc7\u7528\u6237\u8bbf\u95ee\u63a7\u5236\u3002\u4e3e\u4f8b\u6765\u8bf4\uff0ccerber\u4f1a\u9996\u5148\u7ed9\u81ea\u5df1\u63d0\u5347\u6743\u9650\uff0c\u7136\u540e\u4f7f\u7528\u547d\u4ee4\u884c\u5de5\u5177\u5220\u9664\u5907\u4efd\u6587\u4ef6\u3002\u57fa\u4e8e\u4ee5\u4e0a\u8c03\u7814\uff0c\u6211\u4eec\u505a\u51fa\u5982\u4e0b\u4e24\u4e2a\u7ed3\u8bba\u4ee5\u53ca\u63a8\u8bba\uff1a<\/p>\n

\u89c2\u6d4b\u7ed3\u679c1\uff1a\u52d2\u7d22\u75c5\u6bd2\u901a\u5e38\u8fc5\u901f\u5b8c\u6210\u52a0\u5bc6\uff0c\u5e76\u4e14\u52a0\u5bc6\u6570\u636e\u91cf\u76f8\u5bf9\u8f83\u5c0f\u3002<\/p>\n

\u63a8\u8bba1\uff1a\u52d2\u7d22\u75c5\u6bd2\u5e0c\u671b\u51cf\u5c0f\u88ab\u53d1\u73b0\u5e76\u7ec8\u6b62\u7684\u53ef\u80fd\uff0c\u6216\u8005\u653b\u51fb\u8005\u5e0c\u671b\u5c3d\u5feb\u5f97\u5230\u8d4e\u91d1\u3002<\/b><\/strong><\/p>\n

\u89c2\u6d4b\u7ed3\u679c2\uff1a\u52d2\u7d22\u75c5\u6bd2\u60f3\u6d88\u9664\u88ab\u653b\u51fb\u8005\u81ea\u5df1\u6062\u590d\u6587\u4ef6\u7684\u53ef\u80fd\u6027\uff0c\u8ba9\u88ab\u653b\u51fb\u8005\u53ea\u80fd\u9009\u62e9\u652f\u4ed8\u8d4e\u91d1\u3002<\/p>\n

\u63a8\u8bba2\uff1a\u52d2\u7d22\u75c5\u6bd2\u80fd\u591f\u83b7\u5f97\u5185\u6838\u6743\u9650\uff0c\u901a\u8fc7\u9500\u6bc1\u6570\u636e\u5907\u4efd\u7b49\u65b9\u5f0f\u7834\u574f\u8f6f\u4ef6\u5c42\u6b21\u7684\u9632\u5fa1\u7cfb\u7edf\u3002<\/b><\/strong><\/p>\n

\u4ee5\u4e0a\u4e24\u70b9\u7ed3\u8bba\u542f\u53d1\u4e86FlashGuard\u7684\u6838\u5fc3\u8bbe\u8ba1\u601d\u8def\uff1a\u901a\u8fc7\u5907\u4efd\u7cfb\u7edf\u6765\u5bf9\u6297ransomware, \u6211\u4eec\u9700\u8981\u4fdd\u8bc1\u5907\u4efd\u7cfb\u7edf\u5728\u9762\u5bf9\u62e5\u6709\u7ba1\u7406\u5458\u6743\u9650\u7684\u6837\u672c\u65f6\u4f9d\u65e7\u7a33\u5b9a\u6709\u6548\u7684\u8fd0\u884c\u3002\u540c\u65f6\uff0c\u7531\u4e8eransomware\u7684\u5feb\u901f\u52a0\u5bc6\u7279\u6027\uff0c\u5907\u4efd\u7cfb\u7edf\u53ea\u9700\u8981\u5907\u4efd\u76f8\u5bf9\u8f83\u77ed\u65f6\u95f4\u5185\u7684\u6570\u636e\u3002\u4e0b\u9762\u6211\u4eec\u5177\u4f53\u4ecb\u7ecdFlashGuard\u7684\u6280\u672f\u7ec6\u8282\u4ee5\u53ca\u6d4b\u8bd5\u8bc4\u4f30\u3002\u4e3a\u4e86\u4fbf\u4e8e\u7406\u89e3\uff0c\u6211\u4eec\u9996\u5148\u4ecb\u7ecdSSD\u7684\u8986\u5199\u673a\u5236\u3002<\/p>\n

\"\"<\/p>\n

\u56fe 1\uff1a HDD\u548cSSD\u5728\u8986\u5199\u64cd\u4f5c\u4e0a\u7684\u533a\u522b\u3002\u5f53\u903b\u8f91\u533a\u5757x\u53d1\u751f\u8986\u5199\u65f6\uff0cHDD\u4f1a\u76f4\u63a5\u5728\u5bf9\u5e94\u7684\u7269\u7406\u533a\u5757\u4e0a\u8986\u5199\u6570\u636e\u3002\u7136\u800cSSD\u4f1a\u628a\u65b0\u7684\u6570\u636e\u5199\u5230\u65b0\u7684\u7269\u7406\u533a\u5757\uff08z\uff09\u4e0a\uff0c\u5e76\u4e14\u901a\u8fc7\u540e\u7eed\u7684\u5783\u573e\u56de\u6536\u673a\u5236\u56de\u6536\u5931\u6548\u7684\u7269\u7406\u533a\u5757 (y)\u3002<\/p>\n

\u4e0eHDD\u4e00\u4e2a\u663e\u8457\u5730\u4e0d\u540c\u662f\uff0c\u5f53\u903b\u8f91\u4e0a\u7684\u8986\u5199\u53d1\u751f\u65f6\uff0cHDD\u4f1a\u76f4\u63a5\u5728\u7269\u7406\u786c\u4ef6\u4e0a\u8986\u5199\u6570\u636e\u3002\u800cSSD\u901a\u8fc7out-of-place\u673a\u5236\u8986\u5199\u3002\u5728\u53d1\u751f\u8986\u5199\u65f6\uff0cSSD\u628a\u6570\u636e\u5199\u5230\u65b0\u7684\u533a\u5757\u4e2d\uff0c\u5c06\u65e7\u7684\u533a\u5757\u6807\u8bb0\u4e3a\u65e0\u6548\u5e76\u4e14\u901a\u8fc7Garbagae Collegection\u56de\u6536\u65e0\u6548\u533a\u5757\u3002\u8fd9\u79cd\u5dee\u5f02\u53ef\u4ee5\u901a\u8fc7\u56fe 1 \u66f4\u4e3a\u6e05\u6670\u7684\u5c55\u793a\u3002\u7531\u6b64\u53ef\u89c1\uff0cSSD\u5929\u7136\u5730\u4f1a\u5bf9\u88ab\u4e0a\u5c42\u4fee\u6539\u8fc7\u7684\u6570\u636e\u8fdb\u884c\u4e00\u6bb5\u65f6\u95f4\u7684\u5907\u4efd\u3002\u6211\u4eec\u5229\u7528\u8fd9\u4e00\u4e2a\u786c\u4ef6\u7279\u6027\u6765\u8bbe\u8ba1FlashGuard\u3002<\/p>\n

\"\"<\/p>\n

\u56fe 2\uff1a RTFL\u7ed3\u6784\u7b80\u4ecb\u3002RTFL\u5bf9\u4e8eSSD\u5df2\u6709\u7684FTL\u8fdb\u884c\u4e86\u9002\u5f53\u7684\u4fee\u6539\u3002\u53ea\u8981\u662f\u901a\u8fc7\u52a0\u5165\u4e00\u4e2aread tracker table (RTT) \u6765\u8bb0\u5f55\u4e00\u4e2a\u786c\u76d8\u9875\u9762\u662f\u4e0d\u662f\u88ab\u8bfb\u53d6\u8fc7\u3002LPA: \u903b\u8f91\u9875\u5730\u5740; PPA: \u7269\u7406\u9875\u5730\u5740; VPA: \u865a\u62df\u9875\u5730\u5740; PBA: \u7269\u7406\u5757\u5730\u5740\u3002<\/p>\n

FlashGuard\u5efa\u7acb\u5728SSD\u7684\u56fa\u4ef6\u5c42\u4e2d\uff0c\u8fd9\u6837\u7684\u5e26\u6765\u7684\u597d\u5904\u662fFlashGuard\u901a\u8fc7\u786c\u4ef6\u548c\u64cd\u4f5c\u7cfb\u7edf\u9694\u79bb\uff0c\u56e0\u6b64\u53ef\u4ee5\u62b5\u6297\u6765\u81ea\u9ad8\u6743\u9650ransomware\u7684\u653b\u51fb\u3002FlashGuard\u5305\u62ec\u4e24\u4e2a\u4e3b\u8981\u7ec4\u6210\u90e8\u5206\uff0cRansomware-aware Flash Translation Layer (RFTL)\u548c\u6570\u636e\u6062\u590d\u5de5\u5177\u3002<\/p>\n

\u56fe2\u5c55\u793a\u4e86RFTL\u7684\u7ed3\u6784, RFTL\u7684\u4f5c\u7528\u662f\u4fdd\u5b58\u53ef\u80fd\u88ab\u52a0\u5bc6\u52d2\u7d22\u75c5\u6bd2\u8986\u5199\u7684\u6570\u636e\uff0c\u6062\u590d\u5de5\u5177\u4f7f\u5f97\u53d7\u5bb3\u7528\u6237\u53ef\u4ee5\u6062\u590d\u88ab\u52a0\u5bc6\u7684\u6587\u4ef6\u3002\u5176\u4e2d\uff0cFTL\u662f\u4e3b\u6d41SSD\u7684\u539f\u6709\u7ed3\u6784\u3002\u5b83\u901a\u8fc7address mapping table\u53ef\u4ee5\u5c06\u903b\u8f91\u5730\u5740\u8f6c\u6362\u4e3a\u7269\u7406\u5730\u5740\u3002\u57fa\u4e8e\u6548\u7387\u8003\u91cf\uff0c\u6700\u8fd1\u7528\u8fc7\u7684\u5730\u5740\u4f1a\u88ab\u4fdd\u5b58\u5230LRU Cache\u4e2d\u3002\u5f53\u5730\u5740\u6620\u5c04\u8bf7\u6c42\u53d1\u751f\u65f6\uff0c\u5982\u679c\u8bbf\u95ee\u7684\u5730\u5740\u6ca1\u6709\u5728\u6b64cache\u4e2d\uff0cFTL\u901a\u8fc7Global Mapping Directory\u5b8c\u6210\u5730\u5740\u6620\u5c04\u5e76\u5c06\u5bf9\u5e94\u7684\u7ed3\u679c\u66f4\u65b0\u5230LRU Cache\u4e2d\u3002\u6b64\u5916\uff0cBlock Validity Table\u8ddf\u8e2a\u6bcf\u4e2a\u5757\u4e2d\u6709\u6548\u7684\u9875\u6570\u91cf\uff0c \u800cPage Validity Table\u8bb0\u5f55\u4e00\u4e2a\u533a\u5757\u4e2d\u54ea\u4e9b\u9875\u662f\u6709\u6548\u7684\u3002\u8fd9\u4e24\u4e2a\u6570\u636e\u7ed3\u6784\u4e3b\u8981\u7528\u4e8e\u8f85\u52a9\u5783\u573e\u56de\u6536\u3002\u5982\u524d\u6240\u8ff0\uff0c\u5783\u573e\u56de\u6536\u662fSSD\u7684\u4e00\u4e2a\u91cd\u8981\u529f\u80fd\uff0c\u4e3b\u8981\u8d1f\u8d23\u56de\u6536\u5df2\u7ecf\u5931\u6548\u7684\u7269\u7406\u533a\u5757\u3002\u7b80\u5355\u6765\u8bf4\uff0c\u5b83\u8d1f\u8d23\u5c06\u5df2\u7528\u7684\u5b58\u50a8\u5757\u96c6\u4e2d\u5728\u4e00\u8d77\uff0c\u5e76\u4e14\u91ca\u653e\u7a7a\u95f2\u7684\u5b58\u50a8\u7a7a\u95f4\u51fa\u6765\u4f9b\u540e\u7eed\u4f7f\u7528\uff0c\u540c\u65f6\u5b83\u8fd8\u8981\u4fdd\u8bc1\u6240\u6709\u7684\u5757\u7684\u5bff\u547d\u662f\u5e73\u5747\u7684\uff0c\u4ee5\u5ef6\u957fSSD\u7684\u4f7f\u7528\u65f6\u95f4\u3002<\/p>\n

\u4e3a\u4e86\u4f7f\u5f97FlashGuard\u80fd\u591f\u5bf9\u6297\u52d2\u7d22\u75c5\u6bd2\u7684\u653b\u51fb\uff0c\u4e00\u4e2a\u76f4\u63a5\u7684\u65b9\u6848\u662f\u4fdd\u5b58\u6240\u6709\u7684\u65e0\u6548\u9875\uff0c\u76f4\u5230\u52d2\u7d22\u75c5\u6bd2\u88ab\u53d1\u73b0\u3002\u4f46\u662f\u8fd9\u4e2a\u65b9\u6848\u4e0d\u5177\u6709\u53ef\u884c\u6027\u3002\u9996\u5148\uff0cSSD\u5f88\u5feb\u4f1a\u88ab\u65e0\u6548\u6570\u636e\u586b\u6ee1\uff0c\u5bfc\u81f4SSD\u4e0d\u53ef\u7528\u3002\u53e6\u5916\uff0c\u5783\u573e\u56de\u6536\u673a\u5236\u4f1a\u88ab\u66f4\u9891\u7e41\u7684\u89e6\u53d1\uff0c\u5bfc\u81f4\u50a8\u5b58\u6027\u80fd\u7684\u4e0b\u964d\u3002<\/p>\n

\u4e00\u4e2a\u66f4\u597d\u7684\u8bbe\u8ba1\u662f\u53ea\u4fdd\u5b58\u88ab\u52d2\u7d22\u75c5\u6bd2\u7be1\u6539\u8fc7\u7684\u539f\u59cb\u6570\u636e\u3002\u8fd9\u4e2a\u8bbe\u8ba1\u7684\u6311\u6218\u5728\u4e8e\u73b0\u6709\u7684FTL\u65e0\u6cd5\u5206\u8fa8\u51fa\u54ea\u4e9b\u6570\u636e\u662f\u88ab\u52d2\u7d22\u75c5\u6bd2\u8986\u76d6\u7684\u3002\u6211\u4eec\u4eceransomware\u7684\u4e00\u4e2a\u6839\u672c\u6027\u7279\u5f81\u5f97\u5230\u542f\u53d1 — \u52d2\u7d22\u75c5\u6bd2\u5de5\u4f5c\u65f6\u57fa\u672c\u5fc5\u987b\u5148\u4ece\u78c1\u76d8\u8bfb\u53d6\u6570\u636e\uff0c\u5b8c\u6210\u52a0\u5bc6\u5e76\u4e14\u8986\u76d6\u539f\u6709\u6570\u636e\u3002<\/b><\/strong><\/p>\n

\u7531\u6b64\uff0c\u6211\u4eec\u4fdd\u5b88\u7684\u8ba4\u4e3a\u5982\u679c\u4e00\u4e2a\u9875\u5148\u88ab\u8bfb\u53d6\uff0c\u7136\u540e\u518d\u6b21\u88ab\u8986\u5199\uff0c\u5c31\u6709\u53ef\u80fd\u662f\u88abransomware\u6c61\u67d3\u7684\u9875\u3002\u6211\u4eec\u5728FTL\u4e2d\u6dfb\u52a0\u4e00\u4e2a\u7ed3\u6784\u4f53Read Tracker Table\uff08RTT\uff09\u3002\u5f53\u5bf9\u67d0\u4e2a\u9875\u53d1\u751f\u8bfb\u64cd\u4f5c\u65f6\uff0cRTT\u4e2d\u4f1a\u6807\u8bb0\u8be5\u9875\u5df2\u7ecf\u88ab\u8bfb\u53d6\u3002\u5f53\u8fd9\u4e2a\u9875\u88ab\u8986\u5199\u65f6\uff0cFlashGuard\u4f1a\u67e5\u8be2RTT\u4ece\u800c\u786e\u5b9a\u5b83\u66fe\u7ecf\u88ab\u8bfb\u53d6\u8fc7\uff0c\u5e76\u4e14\u8fdb\u4e00\u6b65\u5c06\u5176\u6807\u8bb0\u4e3a\u6c61\u67d3\u9875\u3002\u540c\u65f6\uff0cFlashGuard\u4f1a\u5c06\u8fd9\u4e2a\u8986\u5199\u53d1\u751f\u7684\u65f6\u523b\u8bb0\u5f55\u4e3a\u6c61\u67d3\u65f6\u95f4\u70b9\u3002\u5f53\u5783\u573e\u56de\u6536\u53d1\u751f\u65f6\uff0c\u5982\u679c\u4e00\u4e2a\u6c61\u67d3\u9875\u7684\u6c61\u67d3\u65f6\u95f4\u70b9\u6bd4\u5f53\u524d\u65f6\u523b\u5c11\u4e8e\u4e00\u4e2a\u9608\u503c\uff08\u9ed8\u8ba4\u503c\u4e3a20\u5929\uff09\u65f6\uff0c\u5b83\u4f1a\u786e\u4fdd\u6b64\u6c61\u67d3\u4e5f\u4e0d\u4f1a\u88ab\u56de\u6536\u3002\u56e0\u6b64\uff0c20\u5929\u5185\u7684\u53ef\u80fd\u88ab\u6c61\u67d3\u7684\u6570\u636e\u90fd\u88ab\u4fdd\u7559\u5728SSD\u4e2d\u3002\u6839\u636e\u4e0a\u8ff0\u7684\u8c03\u7814\uff0cransomware\u7684\u52a0\u5bc6\u548c\u6f5c\u4f0f\u65f6\u95f4\u901a\u5e38\u90fd\u5728\u6570\u5c0f\u65f6\u3002\u7531\u6b64\u6211\u4eec\u76f8\u4fe1FlashGuard\u53ef\u4ee5\u6709\u6548\u7684\u5bf9\u6297ransomware\u7684\u653b\u51fb\u3002<\/p>\n

\u6211\u4eec\u57281TB\u7684\u53ef\u7f16\u7a0bSSD\u4e0a\u5b9e\u73b0\u4e86FlashGuard\uff0c\u8fd9\u4e2aSSD\u4e2d\u6bcf\u4e2a\u5757\u5305\u542b64\u4e2a\u9875\uff0c\u6bcf\u4e2a\u98754KB\u3002FlashGuarD\u7684\u5b9e\u73b0\u5b58\u50a8\u5728\u56fa\u4ef6\u4e2d\uff0c\u5e76\u4e14\u88ab\u8bbe\u7f6e\u4e3a\u4e0d\u5141\u8bb8\u4fee\u6539\u3002\u4f5c\u8005\u8fd8\u5b9e\u73b0\u4e86\u4e00\u4e2a\u6062\u590d\u5de5\u5177\uff0c\u80fd\u591f\u5e2e\u52a9\u7528\u6237\u9ad8\u6548\u7684\u5229\u7528FlashGuard\u6062\u590d\u6570\u636e\u3002\u6211\u4eec\u8fdb\u4e00\u6b65\u901a\u8fc7\u4e24\u65b9\u9762\u7684\u5b9e\u9a8c\u6765\u9a8c\u8bc1FlashGuard\u7684\u6709\u6548\u6027\u548c\u6027\u80fd\u5f00\u9500\u3002<\/p>\n

\u6211\u4eec\u4f7f\u7528\u524d\u9762\u63d0\u5230\u8fc7\u76841477\u4e2aransomware\u5b9e\u4f8b\u505a\u653b\u51fb\u5b9e\u9a8c\u3002\u7136\u540e\u5728\u653b\u51fb\u5b8c\u6210\u540e\u901a\u8fc7FlashGuard\u6062\u590d\u88ab\u52a0\u5bc6\u7684\u6570\u636e\u3002\u6700\u7ec8\u5b9e\u9a8c\u7ed3\u679c\u8868\u660e\uff0c\u5bf9\u4e8e\u5b9e\u9a8c\u4e2d\u4f7f\u7528\u7684\u6240\u6709ransomware\uff0cFlashGuard\u90fd\u53ef\u4ee5\u6210\u529f\u6062\u590d\u5168\u90e8\u88ab\u52a0\u5bc6\u7684\u6570\u636e\u3002FalshGuard\u56de\u590d\u7684\u6570\u636e\u5927\u5c0f\u548c\u6240\u9700\u8981\u7684\u65f6\u95f4\u5982\u56fe2\u6240\u793a\u3002<\/p>\n

\"\"<\/p>\n

\u56fe 2\uff1aFlashGuard\u56de\u590d\u7684\u6570\u636e\u5927\u5c0f\u548c\u6240\u9700\u8981\u7684\u65f6\u95f4<\/p>\n

\"\"<\/p>\n

\u56fe 3\uff1a \u672a\u7ecf\u4fee\u6539\u7684SSD\u548cFlashGuard\u8fd0\u884c\u65f6\u6027\u80fd\u6bd4\u8f83 \uff08FlashGuard\u4fdd\u7559\u6c61\u67d3\u6570\u636e\u7684\u65f6\u95f4\u4ece2\u5929\u523020\u5929\u4e0d\u7b49\uff09\u3002<\/p>\n

\u5728\u6027\u80fd\u65b9\u9762\uff0c\u6211\u4eec\u5b9e\u9a8c\u4e2d\u7528\u5230\u7684\u6570\u636e\u90fd\u662f\u4ece\u771f\u5b9e\u7684\u5e94\u7528\u573a\u666f\u4e2d\u5f97\u6765\u7684\uff0c\u6bd4\u5982\u5fae\u8f6f\u5251\u6865\u7814\u7a76\u9662\u670d\u52a1\u5668\u548c\u5927\u5b66\u7535\u8111\u4e0a\u7684I\/O\u6570\u636e\u8bb0\u5f55\u3002\u5728\u5b9e\u9a8c\u4e4b\u524d\uff0c\u6211\u4eec\u6267\u884c\u4e865\u5343\u4e07\u6b21\u8bfb\u5199\u64cd\u4f5c\u201c\u9884\u70ed\u201d\u7cfb\u7edf\u3002\u5b9e\u9a8c\u8bc1\u660eFlashGuard\u5e26\u6765\u7684\u6027\u80fd\u635f\u5931\u5fae\u4e4e\u5176\u5fae\uff0c\u4f5c\u8005\u5206\u6790\u662f\u56e0\u4e3aFlashGuard\u662f\u6839\u636e\u9875\u5148\u88ab\u8bfb\u53c8\u88ab\u6539\u8fd9\u6837\u7684\u89c4\u5219\u4fdd\u7559\u65e0\u6548\u9875\uff0c\u8fd9\u6837\u7684\u64cd\u4f5c\u5728\u6b63\u5e38\u7684\u4f7f\u7528\u4e2d\u5e76\u4e0d\u591a\u89c1\uff0c\u6240\u4ee5\u5728\u4e0d\u53d7\u653b\u51fb\u65f6\u4e0e\u4f20\u7edf\u7684SSD\u5de5\u4f5c\u72b6\u6001\u51e0\u4e4e\u6ca1\u6709\u4e0d\u540c\u3002\u6027\u80fd\u5f71\u54cd\u5b9e\u9a8c\u7ed3\u679c\u5982\u56fe3\u6240\u793a\u3002<\/p>\n

Reference<\/h1>\n

[1] Huang, J., Xu, J., Xing, X., Liu, P., & Qureshi, M. \u201cFlashGuard: Leveraging Intrinsic Flash<\/p>\n

Properties to Defend Against Encryption Ransomware\u201d. In The 24th ACM Conference on<\/p>\n

Computer and Communications Security (CCS 2017), Dallas, USA, 2017<\/p>\n

\u4f5c\u8005\u7b80\u4ecb<\/h1>\n

Jun Xu (\u5f90\u519b), Pennsylvania State University \u535a\u58eb\u5728\u8bfb\uff0c\u5e08\u4ece\u5218\u9e4f\u6559\u6388\u3002\u672c\u79d1\u6bd5\u4e1a\u4e8e\u4e2d\u56fd\u79d1\u5b66\u6280\u672f\u5927\u5b66\uff0c\u66fe\u83b7\u90ed\u6cab\u82e5\u5956\u3002\u7814\u7a76\u5174\u8da3\u4e3a\u8f6f\u4ef6\u548c\u7cfb\u7edf\u5b89\u5168\uff0c\u4ee5\u53ca\u6076\u610f\u8f6f\u4ef6\u9632\u62a4\u3002\u7814\u7a76\u6210\u679c\u66fe\u53d1\u8868\u4e8eCCS, Usenix Security, SenSys\u7b49\u4f1a\u8bae\u3002\u4e2a\u4eba\u4e3b\u9875: http:\/\/www.personal.psu.edu\/jxx13<\/p>\n

Jian Huang is an Assistant Professor in the ECE department at UIUC. He received his Ph.D. from Georgia Tech. His research interests lie in the areas of computer systems, including operating systems, systems architecture, systems security, and especially the intersections of them. He enjoys building systems. His research contributions have been published at ISCA, ASPLOS, FAST, ATC, CCS, VLDB, and SoCC. His work WearDrive won the Best Paper Award at USENIX ATC in 2015 and attracted popular press coverage in many countries. His work FlashMap won the IEEE Micro Top Picks Honorable Mention in 2016.<\/p>\n","protected":false},"excerpt":{"rendered":"

\u4f5c\u8005\uff1aJun Xu (\u5f90\u519b) \u00a0 Jian Huang \u8fd1\u5e74\u6765\uff0c\u4e00\u79cd\u79f0\u4e3aransomware\u7684\u6076\u610f\u8f6f… Continue reading → <\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-2371","post","type-post","status-publish","format-standard","hentry","category-research"],"_links":{"self":[{"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=\/wp\/v2\/posts\/2371","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2371"}],"version-history":[{"count":2,"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=\/wp\/v2\/posts\/2371\/revisions"}],"predecessor-version":[{"id":2381,"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=\/wp\/v2\/posts\/2371\/revisions\/2381"}],"wp:attachment":[{"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2371"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2371"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2371"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}