Secure support for I/O in software cryptoprocessor
US9734092B2 · kind B2 · utility
6Cited by
34References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 19, 2015 |
| Grant date | Aug 15, 2017 |
| Priority date | — |
| Expiry date | Mar 19, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/621
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Methods and systems for securing sensitive data from security risks associated with direct memory access (“DMA”) by input/output (“I/O”) devices are provided. An enhanced software cryptoprocessor system secures sensitive data using various techniques, including (1) protecting sensitive data by preventing DMA by an I/O device to the portion of the cache that stores the sensitive data, (2) protecting device data by preventing cross-device access to device data using DMA isolation, and (3) protecting the cache by preventing the pessimistic eviction of cache lines on DMA writes to main memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.