| 摘要: |
| 提出一种在不可信操作系统中保护应用程序的新方法AppISO.针对传统的虚拟化方法的高开销问题,AppISO在不可信操作系统的同一特权层引入内可信基,代替虚拟机监控器实施应用程序保护,避免了昂贵的特权层切换.同时利用硬件虚拟化,以及页表锁定、影子IDT、切换页面等软件技术保证内可信基的安全性.证明了所提内可信基方法与虚拟化方法具有同样的高安全性.实验和分析结果表明,内可信基方法可显著地提高系统性能. |
| 关键词: 内可信基 应用程序保护 不可信操作系统 虚拟化 |
| DOI：10.13328/j.cnki.jos.005016 |
| 分类号: |
| 基金项目:国家自然科学基金(61170070,61572248,61431008,61321491);国家科技支撑计划(2012BAK26B01);南京大学优秀博士研究生创新能力提升计划B(2015) |
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| Inner TCB Based Application Protection |
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DENG Liang1,2, ZENG Qing-Kai1,2
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1.State Key Laboratory for Novel Software Technology(Nanjing University), Nanjing 210023, China;2.Department of Computer Science and Technology, Nanjing University, Nanjing 210023, China
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| Abstract: |
| This paper presents AppISO, a novel approach to provide whole-application protection in an untrusted operating system(OS). Unlike previous virtualization-based approach, AppISO does not directly use any higher privilege hypervisor for application protection, which is known to cause high overhead due to frequent privilege transitions. Instead, AppISO introduces a software component named Inner TCB running in the same privilege layer with the untrusted OS, and uses Inner TCB to realize application protection. Meanwhile AppISO leverages hardware virtualization and software techniques such as page table lockdown, shadow IDT, and transition page to guarantee the security and isolation of Inner TCB. This paper proves that Inner TCB can achieve the same level of security as hypervisor, and experimental results show that the presented approach has significant improvement in performance. |
| Key words: inner TCB application protection untrusted OS virtualization |
