Abstract
Due to the intrinsic properties of Solid-State Drives (SSDs), invalid data remain in SSDs before erased by a garbage collection process, which increases the risk of being attacked by adversaries. Previous studies use erase and cryptography based schemes to purposely delete target data but face extremely large overhead. In this paper, we propose a Workload-Aware Secure Deletion scheme, called WAS-Deletion, to reduce the overhead of secure deletion by three major components. First, the WAS-Deletion scheme efficiently splits invalid and valid data into different blocks based on workload characteristics. Second, the WAS-Deletion scheme uses a new encryption allocation scheme, making the encryption follow the same direction as the write on multiple blocks and vertically encrypts pages with the same key in one block. Finally, a new adaptive scheduling scheme can dynamically change the configurations of different regions to further reduce secure deletion overhead based on the current workload. The experimental results indicate that the newly proposed WAS-Deletion scheme can reduce the secure deletion cost by about 1.2x to 12.9x compared to previous studies.
| Original language | English (US) |
|---|---|
| Title of host publication | Proceedings - 2021 IEEE 39th International Conference on Computer Design, ICCD 2021 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 244-247 |
| Number of pages | 4 |
| ISBN (Electronic) | 9781665432191 |
| DOIs | |
| State | Published - 2021 |
| Event | 39th IEEE International Conference on Computer Design, ICCD 2021 - Virtual, Online, United States Duration: Oct 24 2021 → Oct 27 2021 |
Publication series
| Name | Proceedings - IEEE International Conference on Computer Design: VLSI in Computers and Processors |
|---|---|
| Volume | 2021-October |
| ISSN (Print) | 1063-6404 |
Conference
| Conference | 39th IEEE International Conference on Computer Design, ICCD 2021 |
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| Country/Territory | United States |
| City | Virtual, Online |
| Period | 10/24/21 → 10/27/21 |
Bibliographical note
Funding Information:scheme efficiently splits invalid and valid pages into different blocks or chunks according to the historical accumulated update frequency and update request size. Second, a vertical encryption scheme is applied to the scheme which reduces the migration overhead. Third, the request size is used as a ‘hotness’ factor to cluster similar data in the same region associated with the write request size. Finally, an adaptive scheme is used to adjust the region configuration according to the workload access patterns. In the experimental results, the newly proposed WAS-Deletion scheme is capable of reducing the secure deletion time about 1.2x to 12.9x compared to previous studies. Moreover, the breakdown analysis and investigation about different design parameters are provided and contribute to a deeper understanding of the trade-offs in the secure deletion of SSDs. VI. ACKNOWLEDGEMENT This work was partially supported by NSF I/UCRC Center Research in Intelligent Storage and the following NSF awards 1439622, and 1812537. REFERENCES
Publisher Copyright:
© 2021 IEEE.