81–90 of 221 posts
Earlier quoted context omitted.
It's a solid piece of silicon encased in epoxy, so there's nothing really to get crushed. Contrast this to something like a cellphone that's made of hundreds of separate parts and has void space that will get crushed.
Why isn't a cellphone filled with epoxy?
I see a lot of discussion in this thread stemming from some confusion+not reading the actual report[0]. Some key points: 1. The Camera+Card was encased in a separate enclosure made of titanium+sapphire, and did not seem to be exposed to extreme pressures. 2. The encryption was done via a variant of LUKS/dm-crypt, with the key stored on the NVRAM of a chip (Edited; not in TrustZone). 3. The recovery was done by transp…
Unless I misread the article, the key was stored in the NVRAM and not the TrustZone. IIRC, the article stated that if the key(s) had been stored in the TrustZone then the data would have been irrecoverable.
I see a lot of discussion in this thread stemming from some confusion+not reading the actual report[0]. Some key points: 1. The Camera+Card was encased in a separate enclosure made of titanium+sapphire, and did not seem to be exposed to extreme pressures. 2. The encryption was done via a variant of LUKS/dm-crypt, with the key stored on the NVRAM of a chip (Edited; not in TrustZone). 3. The recovery was done by transp…
If the encryption was that easy to bypass, was it worth it at all?
It also makes bit flip errors a lot more obvious, which is another way of saying harder to ignore, so that can go either way.
Earlier quoted context omitted.
Why isn't a cellphone filled with epoxy?
How would you do screen replacement? That is a common repair since people drop their phones and currently you can get your phone repaired by some teenager in a booth at the mall. If you fill the phone with epoxy, how are you detaching the screen, and getting a new ribbon cable through the epoxy?
Earlier quoted context omitted.
Why isn't a cellphone filled with epoxy?
> Why isn't a cellphone filled with epoxy? Added cost and weight are two things that would put off consumers. The phone would also be neigh irreparable, but consumers don't seem to care for that other than replacing their screen.
Earlier quoted context omitted.
It's a solid piece of silicon encased in epoxy, so there's nothing really to get crushed. Contrast this to something like a cellphone that's made of hundreds of separate parts and has void space that will get crushed.
Why isn't a cellphone filled with epoxy?
The NTSB's original report has more detail on how the SD Card was encrypted and how the NTSB managed to decrypt it: https://data.ntsb.gov/Docket/Document/docBLOB?ID=18741602&Fi...
It uses a Qualcomm Snapdragon 820 and they provide prebuilt Ubuntu Linaro distros for it, preconfigured for the board.
The camera manufacturer likely just tossed it straight in as configured and thus didn't know how the full disk encryption was setup.
This whole camera design looks like one of those 'we gave this project to some undergrad engineering students who've never designed a commercial product before and had no price target and thus it has a whole damn embedded linux system inside it for merely taking some HD video and stills triggered by some external wiring and saving them to an SD card'.
See also: almost any specialty medical electronic device ever manufactured.
[0] https://linuxgizmos.com/tiny-rugged-com-runs-linux-or-androi...
Earlier quoted context omitted.
It's a solid piece of silicon encased in epoxy, so there's nothing really to get crushed. Contrast this to something like a cellphone that's made of hundreds of separate parts and has void space that will get crushed.
Why isn't a cellphone filled with epoxy?