2 ms·
Is it simple? From what I understand it is still not clear how Rowhammer is physically possible. If you don't know how it's possible, then current manufacturers
by mettamage 8y ago
Is it simple? From what I understand it is still not clear how Rowhammer is physically possible. If you don't know how it's possible, then current manufacturers may not know how to create good memory. We don't get everything in physics yet and it's affecting our ability to make good memory chips that are secure.
One possible explanation of how it is possible, the parasitic coupling effect: https://github.com/google/rowhammer-test/blob/master/docs/references.md https://github.com/google/rowhammer-test/blob/master/docs/re...
- brennanpeterson 8y agoIt is entirely clear how and why it happens. It is a trade-off of density and coupling: the closer you get, the higher the parasitics. But if you stay far apart, you have low density (expensive). You also likely need different caching, error correction, and refresh settings. The concept of parasitic write induced loss is really old in memory. Happens in NAND flash too. It is perhaps surprising that attacks like rowhammer never happened before. Or maybe we never knew?