Technique for detecting and thwarting row-hammer attacks
US11354408B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 2019 |
| Grant date | Jun 7, 2022 |
| Priority date | — |
| Expiry date | May 19, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/034
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A memory controller for a (DRAM) memory processes an (access) command for a target row in the memory, increments a count value for each victim row associated with the target row, and issues a (dummy activate) command for a victim row whose count value reaches a specified threshold. By tracking victim rows instead of target rows, the memory controller can thwart both single-sided and double-sided row-hammer attacks. The memory controller maintains the victim-row addresses and corresponding command counts in a TCAM memory to detect rows that may be prone to row-hammer attacks. If so, then the memory controller issues dummy activate commands to the corresponding memory rows to thwart such row-hammer attacks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.