4 ms·

iOS doesn't let apps silently screen record.

• shkkmo 1y ago
  How are you sure? This isn't abusing some poorly secured screenshot API, this is a timing attack on the GPU rendering process and impacts a wide range of GPUs.
  • potwinkle 1y ago
    No. This isn't Spectre/Meltdown for GPUs, it takes advantage of SurfaceFlinger giving apps information on what's drawn behind them.
    • shkkmo 1y ago
      This attack measures the time needed to draw each pixel which varies due to graphical data compression. It is based on the "GPU.zip" vulnerability which was shown to affect most modern GPUs, including from Apple.
• lostmsu 1y ago
  Neither does Android. This is a timing attack on rendering.
• ajross 1y ago
  That's not what's happening here. The attack is exploiting a side channel of the rendering behavior, not reading the screen. There's no particular reason to believe that iOS is immune to something like this, though certainly no claim has been made. It's a new idea, it'll take a while for people to puzzle through the implications.