Things like this are a reason I unhesitatingly recommend that people stick with their OS's built in FDE:
1. FDE is extremely limited. This particular attack is a clever abuse of sleep/reboot cycles, but of course people intimately familiar with FDE know that if a laptop is sleeping but not shut down it's already perilously close to the boundary at which FDE breaks down. And, of course, once it's woken up and unlocked --- which every attacker who actually challenges FDE can arrange for, all bets are off.
2. When flaws like this are found, the OS vendors have much more recourse than third parties do, which is why this post concludes by saying that Macs are now the most secure laptop platform with respect to DMA attacks against FDE.
Use FDE! Enable it on all your machines! But try not to rely on it, and don't waste too much time optimizing it.
1. FDE is extremely limited. This particular attack is a clever abuse of sleep/reboot cycles, but of course people intimately familiar with FDE know that if a laptop is sleeping but not shut down it's already perilously close to the boundary at which FDE breaks down. And, of course, once it's woken up and unlocked --- which every attacker who actually challenges FDE can arrange for, all bets are off.
2. When flaws like this are found, the OS vendors have much more recourse than third parties do, which is why this post concludes by saying that Macs are now the most secure laptop platform with respect to DMA attacks against FDE.
Use FDE! Enable it on all your machines! But try not to rely on it, and don't waste too much time optimizing it.