Jan 31, 2023 · RowHammer is the phenomenon in which repeatedly accessing a row in a real DRAM chip causes bitflips (i.e., data corruption) in physically nearby rows. This phenomenon leads to a serious and widespread system security vulnerability, as many works since the original RowHammer paper in 2014 have shown.

Sep 1, 2024 · This approach involves setting up row activation counters in the DRAM chip to track the number of activations for each row. A refresh or access blocking is triggered when the activation count exceeds a threshold (typically half of the row hammer flip threshold).

Thus, we propose Graphene, a low-cost Row Hammer prevention technique based on a space-efficient algorithm that identifies frequent elements from an incoming data stream. Graphene is provably secure without false negatives and with tightly bounded false positives.

As DRAM scales to lower technology nodes, the threshold for the number of row activations that causes data loss for the neighboring rows reduces, making Row Hammering a challenging problem for future DRAM chips.

DRAM systems continue to be plagued by the Row-Hammer (RH) security vulnerability. The threshold number of row activations ( ) required to induce RH has reduced rapidly from 139K in 2014 to 4.8K in 2020, and is expected to reduce further, …

To address this gap, we propose SMS, a solution specifically designed to tackle many-sided RowHammer while also mitigating classic RowHammer.

DRAM systems continue to be plagued by the Row-Hammer (RH) security vulnerability. The threshold number of row activations (TRH) required to induce RH has reduced rapidly from 139K in 2014 to 4.8K in 2020, and TRH is expected to reduce further, making RH even more severe for …

RowHammer is the phenomenon in which repeatedly accessing a row in a real DRAM chip causes bitflips (i.e., data corruption) in physically nearby rows. This phenomenon leads to a serious and widespread system security vulnerability, as many works since the original RowHammer paper in 2014 have shown.

Row-Hammer is a significant security threat as an attacker can exploit the bit-flips to do privilege escalation and leak confidential data. While several solutions aim to mitigate RH, such solutions depend on the RH threshold and adversarial access patterns. Solutions developed for a given threshold become ineffective for newer devices with

Rowhammer occurs when a DRAM row is accessed repeatedly, potentially causing bit-flips for neighboring rows. The threshold for Rowhammer has decreased from 139K accesses in 2014 to 3.2K in 2022. This threshold is projected to decrease further.