There are well known attacks that allow to read memory, and even write, thought DMA. See for example: 0wned by an iPod - hacking by Firewire http://md.hudora.

There are well known attacks that allow to read memory, and even write, thought DMA. See for example: 0wned by an iPod - hacking by Firewire http://md.hudora.de/presentations/#firewire-pacsec http://md.hudora.de/presentations/#firewire-pacsec More papers are linked in the wikipedia page: http://en.wikipedia.org/wiki/DMA_attack http://en.wikipedia.org/wiki/DMA_attack