Personal Black Box?

Karl gmkarl at
Wed Jun 10 00:25:50 PDT 2020

It's obvious that people who are oppressed by local authorities need a
personal black box.

I am interesting in participating in designing and building one.  It helps
me to set a norm of speaking concisely and to the point, as reading can be
hard for me when working.  I am sorry if I have skimmed over something
already said.

Have you started any projects?

I have started (nodejs, messy) and (c++
livestreams data to sia skynet with hash identifiers).  openrealrecord has
an open bounty of I think a little over $1000 that a
contributor never claimed, left over from back when I had money.

I also started developing videorecording in guardianproject's haven app
towards this goal .

I'd like to build this in a way that quickly gets it usable by average
people.  Once it is easy to use and stable the people who can make the most
use of it can share it among each other and more developers may contribute

Am I on the same page as you?

On Mon, Oct 1, 2018, 2:16 AM jim bell <jdb10987 at> wrote:

> A few weeks ago, I got done binge-watching every episode of NCIS, and am
> now up to Season 4 of Criminal Minds.  Naturally, this induces a bit of
> what I'll call cinematic paranoia.   In what seems to be a majority of
> episodes, a victim gets attacked, usually ends up dead, and the plucky
> investigators are stuck trying to figure out what happened.  Naturally,
> they usually do, but only after about 45 minutes of high-tension showtime.
> It occurs to me that what people may need, for physical security, would be
> what might be called a "personal black box", analogous to an airplane
> flight recorder.  Or, a civilian version of a cop's body-cam.
>   Any modern smartphone would have the basics of such a device:  A
> high-resolution camera, microphone, and a huge amount of storage.  And a
> quick 911-call if necessary.  The mere possession and use of such a device
> would probably deter the large majority of potential attackers.  And even
> if it does not completely protect a given user, it would allow far more
> easy identification of the perpetrator.    Parts of this, of course, are
> not a new idea.
> However, storage is not enough:  In use, in some instances, an attacker
> would presumably be aware enough to take or break the device, so some sort
> of continuous or discontinuous upload of the data could be done, to be
> available no matter what else happens.  Say, a frame per second when
> nothing seems to be happening, and a greater rate when triggered somehow.
> Could a heart-rate monitor be employed, sensed one axis of the phone's
> accelerometers?  Or if the wearer falls down?  Or if a sufficiently-loud
> noise is heard, etc.  Or if a trigger-word is spoken a la Siri?
> Can the data transfer be made economical?  Even an average of 1
> megabit/second would be over one gigabyte during a 3 hour usage per day.
> That's substantially greater than most people currently use.  One
> possibility is that the phone could upload the data to the cell phone
> company, where it could be "parked" for a few seconds or minutes.  If
> nothing happens to the phone to cause a trigger (some sort of attack) the
> phone could instruct the cell phone company to abandon the data.
> Conversely, if a trigger occurs, the cell phone company would move 100% of
> the data to a backup system for later retrieval.  Presumably, the cell
> phone company would offer discounted rates for such transfers, and only
> offer that service if the local service is sufficiently unloaded at that
> moment.
>             Jim Bell
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