> The takeaway is that your children may grow up in a world where it's impossible to guarantee the government can't get into your computer if it really wanted to.
This is impossible to guarantee today. Certainly if you run the zero-day magnets known as browsers, and even if not, there is always some possibility of physical intrusion.
> More and more network adapters seem to have DMA access to your computer.
With an IOMMU (VT-d or equivalent on other platforms), it should be possible to protect against malicious DMA from any source.
Also, not all phones have basebands with DMA access to main memory. I think iPhones do not, though I am not sure, and some older iPhones have been attacked by turning on "auto answer", demonstrating direct access to the microphone.
This is impossible to guarantee today. Certainly if you run the zero-day magnets known as browsers, and even if not, there is always some possibility of physical intrusion.
> More and more network adapters seem to have DMA access to your computer.
With an IOMMU (VT-d or equivalent on other platforms), it should be possible to protect against malicious DMA from any source.
Also, not all phones have basebands with DMA access to main memory. I think iPhones do not, though I am not sure, and some older iPhones have been attacked by turning on "auto answer", demonstrating direct access to the microphone.