Do you have experience with "infrared camera detection" on mobile devices?

Do you have experience with "infrared camera detection" on mobile devices?

If so, how do you assess the difference between
o How the infrared camera detection works on a mobile device, versus
o Similar functionality, in almost _any_ digital video camera viewfinder?

Note this question is only about the inherent infrared detection
differences between almost any digital camera ... and these "green-screen"
viewfinder apps.

Today I decided to check an area for hidden cameras and microphones
where the first non-obnoxiousware non-Internet non-GPS-aware
free tool I happened to test was
o Detect Hidden Camera, version 1.9
o (com.techno95.detecthiddencameraandmicrophone)

The way "it" works is pretty simple, apparently, where
o It detects rf emitters using the magnetometer reading, and
o It detects infrared emitters using a "green screen" video viewfinder

Based on an Internet search, these tools abound on both iOS & Android:
https://knowtechie.com/smartphone-apps-can-help-detect-hidden-cameras-anywhere/
https://www.techzac.com/best-hidden-camera-detector-apps-android/
http://www.graphictunnel.com/2017/09/best-hidden-camera-detector-apps.html
etc.

My question for this newsgroup is only about that green-screen viewfinder.
Q: Essentially, other than being "green" - how is it any different from
almost _any_ digital video viewfinder (all of which seem to detect infrared
emissions)?

On 1/25/19 11:23 PM, arlen holder wrote:
Do you have experience with "infrared camera detection" on mobile devices?

Go away.

--
"I am a river to my people."
Jeff-1.0
WA6FWi
http:foxsmercantile.com

On 26/01/2019 10:20, Fox's Mercantile wrote:
On 1/25/19 11:23 PM, arlen holder wrote:
Do you have experience with "infrared camera detection" on mobile
devices?

Go away.

+1

In article
Fox's Mercantile wrote:

On 1/25/19 11:23 PM, arlen holder wrote:
Do you have experience with "infrared camera detection" on mobile devices?

Go away.

--
"I am a river to my people."
Jeff-1.0
WA6FWi
http:foxsmercantile.com

Big mistake placing your call sign in your sig.

If you're going to get into arguments with people on Usenet, there are
some very mean people who will look you up in the FCC call sign
registry and cause you and your family immense problems. They can go
to a site such as Intelius and with their credit card learn the entire
public record of your life. It has happened again and again on Usenet,
and they guy you're screwing with is one of the sock puppets of a guy
who does such a thing. An American Indian named Eagle made that same
mistake with his call sign. They drove him off from Usenet with
threats to his entire family. Others have suffered the same fate.

It's probably a bit late, but If I were you I'd drop that call sign
from your sig file.

On 1/26/19 3:26 PM, Nomen Nescio wrote:
It's probably a bit late, but If I were you I'd drop that call sign
from your sig file.

I appreciate the concern, but I ain't afraid of assholes on Usenet.


--
"I am a river to my people."
Jeff-1.0
WA6FWi
http:foxsmercantile.com

In article
Fox's Mercantile wrote:

On 1/25/19 11:23 PM, arlen holder wrote:
Do you have experience with "infrared camera detection" on mobile devices?

Go away.

--
"I am a river to my people."
Jeff-1.0
WA6FWi
http:foxsmercantile.com

Big mistake placing your call sign in your sig.

If you're going to get into arguments with people on Usenet, there are
some very mean people who will look you up in the FCC call sign
registry and cause you and your family immense problems. They can go
to a site such as Intelius and with their credit card learn the entire
public record of your life. It has happened again and again on Usenet,
and they guy you're screwing with is one of the sock puppets of a guy
who does such a thing. An American Indian named Eagle made that same
mistake with his call sign. They drove him off from Usenet with
threats to his entire family. Others have suffered the same fate.

It's probably a bit late, but If I were you I'd drop that call sign
from your sig file.

On Sat, 26 Jan 2019 05:23:34 -0000 (UTC), arlen holder
wrote:

o Detect Hidden Camera, version 1.9

Nothing found on the Play store.

o (com.techno95.detecthiddencameraandmicrophone)

There's nothing by techno95 remaining on the Google Play Store.
However, you can get the APK if you want to live dangerously:
https://www.apkfollow.com/app/detect-hidden-cameras-and-microphones/com.techno95.detecthiddencameraandmicrophone/

Let us know when you find a URL that I can use for these. Like most
people, I don't like to waste my time Googling for things that you
could easily provide as a URL.

While you're looking, consider that finding a hidden camera requires
that the camera emits something that you can detect with your
smartphone. That limits it to RF emissions of some sort, magnetic
emissions from the lens auto focus electronics, or IR emissions from
some manner of illuminator. You might to better with a spectrum
analyzer (or RTL-SDR dongle) and look for the camera clock oscillator,
LAN clock frequency, or RF backhaul frequency. CCTV cameras are often
powered by 24VAC. Maybe look for a 60Hz AC power field where one
would normally not be expected.

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

On 2019/01/26 1:46 p.m., Jeff Liebermann wrote:
On Sat, 26 Jan 2019 05:23:34 -0000 (UTC), arlen holder
wrote:

o Detect Hidden Camera, version 1.9

Nothing found on the Play store.

o (com.techno95.detecthiddencameraandmicrophone)

There's nothing by techno95 remaining on the Google Play Store.
However, you can get the APK if you want to live dangerously:
https://www.apkfollow.com/app/detect-hidden-cameras-and-microphones/com.techno95.detecthiddencameraandmicrophone/

Let us know when you find a URL that I can use for these. Like most
people, I don't like to waste my time Googling for things that you
could easily provide as a URL.

While you're looking, consider that finding a hidden camera requires
that the camera emits something that you can detect with your
smartphone. That limits it to RF emissions of some sort, magnetic
emissions from the lens auto focus electronics, or IR emissions from
some manner of illuminator. You might to better with a spectrum
analyzer (or RTL-SDR dongle) and look for the camera clock oscillator,
LAN clock frequency, or RF backhaul frequency. CCTV cameras are often
powered by 24VAC. Maybe look for a 60Hz AC power field where one
would normally not be expected.


Another detector for a hidden camera lens is the reflective LED method.
You wear a headdress of LEDs facing outwards just above your eyes and if
you see bright point reflections then you may have found your hidden
camera (lens)...

This was explored in the book by Cory Doctorow "Little Brother"

https://boingboing.net/2008/05/09/ho...ct-hidden.html

John :-#)#

On Sat, 26 Jan 2019 15:05:10 -0800, John Robertson
wrote:
Another detector for a hidden camera lens is the reflective LED method.
You wear a headdress of LEDs facing outwards just above your eyes and if
you see bright point reflections then you may have found your hidden
camera (lens)...

This was explored in the book by Cory Doctorow "Little Brother"
https://boingboing.net/2008/05/09/ho...ct-hidden.html
John :-#)#

Nice idea. My initial guess(tm) was that the anti-reflective coating
on the camera lens would umm... not reflect anything:
https://www.instructables.com/id/How-to-locate-pinhole-cameras/
The instructions are value and ambiguous. It took me a while to
decode how it is intended to be used.

The purpose of the toilet paper tube is prevent the user from seeing
the direct light from the flashlight. In order to get a tolerable
reflection, the flashlight should be close and parallel to the toilet
paper tube. Once I did that, I was able to see reflections from some
of my various cameras, but also reflections from anything shiny in the
house. The lenses that did not reflect light were those with clear
plastic lens protectors, which reflected nothing no matter what I
tried. Actually, there was plenty of light scattering, but nothing
that could be seen as a reflected spot. That eliminated some of my
laptop web cameras and outdoor security cameras. How well it works in
the field, I don't know. Probably better than inside my house because
of the lack of spurious reflections.

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

On 1/27/19 12:03 AM, Jeff Liebermann wrote:
On Sat, 26 Jan 2019 15:05:10 -0800, John Robertson
wrote:
Another detector for a hidden camera lens is the reflective LED method.
You wear a headdress of LEDs facing outwards just above your eyes and if
you see bright point reflections then you may have found your hidden
camera (lens)...

This was explored in the book by Cory Doctorow "Little Brother"
https://boingboing.net/2008/05/09/ho...ct-hidden.html
John :-#)#

Nice idea. My initial guess(tm) was that the anti-reflective coating
on the camera lens would umm... not reflect anything:

It's the retroreflection from the surface of the image sensor that you
see, like a cat's eye in the dark. If the sensor is at the focus of the
lens, the reflection goes straight back to the light source.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com