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Security Analysis of the Silver Bullet Technique for RowHammer Prevention
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The purpose of this document is to study the security properties of the Silver Bullet algorithm against worst-case RowHammer attacks. We mathematically demonstrate that Silver Bullet, when properly configured and implemented in a DRAM chip, can securely prevent RowHammer attacks. The demonstration focuses on the most representative implementation of Silver Bullet, the patent claiming many implementation possibilities not covered in this demonstration. Our study concludes that Silver Bullet is a promising RowHammer prevention mechanism that can be configured to operate securely against RowHammer attacks at various efficiency-area tradeoff points, supporting relatively small hammer count values (e.g., 1000) and Silver Bullet table sizes (e.g., 1.06KB).
Forward citations
Cited by 2 Pith papers
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When Mitigations Backfire: Timing Channel Attacks and Defense for PRAC-Based RowHammer Mitigations
PRAC's Alert Back-Off mitigation creates observable memory latency spikes that leak partial AES keys, and periodic activity-independent RFMs close the leak with 3.4 percent average overhead.
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CODA: How to Mitigate ColumnDisturb for (Almost) Free?
CODA reduces required adjacent-counter increments for inter-subarray ColumnDisturb protection by 12x–1300x, restoring SALT/Ganged-SALT and REGA to near-zero slowdown and power overhead.
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