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| Content Provider | ACM Digital Library |
|---|---|
| Author | Dwoskin, Jeffrey Ports, Dan R.K. Subrahmanyam, Pratap Chen, Xiaoxin Garfinkel, Tal Waldspurger, Carl A. Lewis, E. Christopher Boneh, Dan |
| Abstract | Commodity operating systems entrusted with securing sensitive data are remarkably large and complex, and consequently, frequently prone to compromise. To address this limitation, we introduce a virtual-machine-based system called Overshadow that protects the privacy and integrity of application data, even in the event of a total OScompromise. Overshadow presents an application with a normal view of its resources, but the OS with an encrypted view. This allows the operating system to carry out the complex task of managing an application's resources, without allowing it to read or modify them. Thus, Overshadow offers a last line of defense for application data. Overshadow builds on multi-shadowing, a novel mechanism that presents different views of "physical" memory, depending on the context performing the access. This primitive offers an additional dimension of protection beyond the hierarchical protection domains implemented by traditional operating systems and processor architectures. We present the design and implementation of Overshadow and show how its new protection semantics can be integrated with existing systems. Our design has been fully implemented and used to protect a wide range of unmodified legacy applications running on an unmodified Linux operating system. We evaluate the performance of our implementation, demonstrating that this approach is practical. |
| Ending Page | 13 |
| Page Count | 12 |
| Starting Page | 2 |
| File Format | PDF MP4 MP2 / MPA / MP3 |
| ISSN | 01635964 |
| DOI | 10.1145/1353534.1346284 |
| Journal | ACM SIGARCH Computer Architecture News (CARN) |
| Issue Number | 1 |
| Volume Number | 36 |
| Language | English |
| Publisher | Association for Computing Machinery (ACM) |
| Publisher Date | 1981-04-01 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Cloaking Virtual machine monitors Hypervisors Operating systems Vmm Multi-shadowing Memory protection |
| Content Type | Audio Text |
| Resource Type | Article |
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