[adolph]

I was surprised by the USB cable thing, but then I remembered:

- Apple's Lightning Digital AV Adapter: https://www.panic.com/blog/the-lightning-digital-av-adapter-...

- Bunny Huang on Micro SD processors: http://www.bunniestudios.com/blog/?p=3554

- Commercially available wireless on SD cards: http://www.eye.fi/

USB lacks DMA right? https://en.wikipedia.org/wiki/DMA_attack

[MertsA]

USB lacks DMA but that's basically a moot point. There are so many USB drivers that aren't well tested or even well written that the attack surface is just huge. You might as well have DMA from USB, wouldn't really make matters that much worse.