Awwkk, lasers invading your home

W

Winfield Hill

Guest
Laser-Based Audio Injection on Voice-Controllable Systems

https://it.slashdot.org/story/19/11/04/2054230/with-a-laser-researchers-say-they-can-hack-alexa-google-home-or-siri

https://lightcommands.com/

https://lightcommands.com/20191104-Light-Commands.pdf

Common 60mW lasers were sufficient for the task.



--
Thanks,
- Win
 
On 2019/11/04 6:10 p.m., Winfield Hill wrote:
Laser-Based Audio Injection on Voice-Controllable Systems

https://it.slashdot.org/story/19/11/04/2054230/with-a-laser-researchers-say-they-can-hack-alexa-google-home-or-siri

https://lightcommands.com/

https://lightcommands.com/20191104-Light-Commands.pdf

Common 60mW lasers were sufficient for the task.
Click to expand...

So, a voice modulated laser beam that any clever kid can build in
minutes from his or her junk pile can take over Alexa, etc?

Most of us could sketch the design in a minute or two. IR Laser (with
small resistor) across the output of a small audio amp, or even using
your computer is the easiest I'm sure.

Next folks will be gathering voices from videos (etc.) to over-ride
folks' voice activated stuff...

How very not amusing...

Keep your curtains closed!

John :-#(#
 
On 4 Nov 2019 18:10:59 -0800, Winfield Hill <winfieldhill@yahoo.com>
wrote:

Laser-Based Audio Injection on Voice-Controllable Systems

https://it.slashdot.org/story/19/11/04/2054230/with-a-laser-researchers-say-they-can-hack-alexa-google-home-or-siri

https://lightcommands.com/

https://lightcommands.com/20191104-Light-Commands.pdf

Common 60mW lasers were sufficient for the task.
Click to expand...

Very interesting this hacking mechanism !

Somehow I don't think this will become a big problem though.
 
On Monday, November 4, 2019 at 9:11:17 PM UTC-5, Winfield Hill wrote:
Laser-Based Audio Injection on Voice-Controllable Systems

https://it.slashdot.org/story/19/11/04/2054230/with-a-laser-researchers-say-they-can-hack-alexa-google-home-or-siri

https://lightcommands.com/

https://lightcommands.com/20191104-Light-Commands.pdf

Common 60mW lasers were sufficient for the task.
Click to expand...

Many years ago when I was in college a chemistry professor was working with a self-built photo-acoustic spectrophotometer. It used a white light source, monochromator and a rotating disk with holes to chop the light beam. This would illuminate a specimen and the pulsating light would be absorbed by the sample and produce sound from the heating effect. More absorption would produced a louder sound. A mic would pick up the sound produced and the monochromator would sweep a range of wavelengths to produce a spectrograph.

I expect this microphone trick with the laser is similar in that the heating from the variations in the laser beam is producing vibrations directly in the microphone.

--

Rick C.

- Get 1,000 miles of free Supercharging
- Tesla referral code - https://ts.la/richard11209
 
On Mon, 04 Nov 2019 18:10:59 -0800, Winfield Hill wrote:

Laser-Based Audio Injection on Voice-Controllable Systems

https://it.slashdot.org/story/19/11/04/2054230/with-a-laser-researchers-
say-they-can-hack-alexa-google-home-or-siri

https://lightcommands.com/

https://lightcommands.com/20191104-Light-Commands.pdf

Common 60mW lasers were sufficient for the task.
Click to expand...

ISTR many decades ago it was postulated that a laser (still almost in the
realms of SciFi back then) could be used to bounce light off a suspect's
window to a photodetector, enabling the sound vibrations from within the
room to be captured. So this isn't really anything new.



--
This message may be freely reproduced without limit or charge only via
the Usenet protocol. Reproduction in whole or part through other
protocols, whether for profit or not, is conditional upon a charge of
GBP10.00 per reproduction. Publication in this manner via non-Usenet
protocols constitutes acceptance of this condition.
 
On 05/11/2019 02:10, Winfield Hill wrote:
Laser-Based Audio Injection on Voice-Controllable Systems

https://it.slashdot.org/story/19/11/04/2054230/with-a-laser-researchers-say-they-can-hack-alexa-google-home-or-siri

https://lightcommands.com/

https://lightcommands.com/20191104-Light-Commands.pdf

Common 60mW lasers were sufficient for the task.
Click to expand...

Although common 60mW lasers are more of an industrial item.
Interesting that the microphone in "she who must not be named" is
sufficiently photosensitive for this photo stimulation trick to work.

There was an amusing one with smart assistants on BBC Radio4 last week
when they tried to demo one on air. Google effectively crashed for a
moment when they issued the fateful command live on air and every Alexa
that was listening to the radio tried to respond at once (followed by
the ones listening to DAB a second or two later). The result was that
the one in the studio proved remarkably shy - as did all the others.
Google had enough compute power for them all to wake up but not enough
to service a huge number of synchronous simultaneous voice requests.

--
Regards,
Martin Brown
 
On 05/11/2019 14:07, John Robertson wrote:
On 2019/11/04 6:10 p.m., Winfield Hill wrote:
  Laser-Based Audio Injection on Voice-Controllable Systems

https://it.slashdot.org/story/19/11/04/2054230/with-a-laser-researchers-say-they-can-hack-alexa-google-home-or-siri


https://lightcommands.com/

https://lightcommands.com/20191104-Light-Commands.pdf

  Common 60mW lasers were sufficient for the task.

So, a voice modulated laser beam that any clever kid can build in
minutes from his or her junk pile can take over Alexa, etc?

Most of us could sketch the design in a minute or two. IR Laser (with
small resistor) across the output of a small audio amp, or even using
your computer is the easiest I'm sure.

Next folks will be gathering voices from videos (etc.) to over-ride
folks' voice activated stuff...

How very not amusing...

Keep your curtains closed!
Click to expand...
I'm more worried about them setting fire to my curtains whilst trying
this trick.
 
On 5/11/2019 1:10 pm, Winfield Hill wrote:
Laser-Based Audio Injection on Voice-Controllable Systems

https://it.slashdot.org/story/19/11/04/2054230/with-a-laser-researchers-say-they-can-hack-alexa-google-home-or-siri

https://lightcommands.com/

https://lightcommands.com/20191104-Light-Commands.pdf

Common 60mW lasers were sufficient for the task.
Click to expand...

Never mind lasers. What about shouting "OK Google Open the door" through
the window?

Sylvia.
 
On 05/11/2019 13:05, Tom Gardner wrote:
On 05/11/19 02:10, Winfield Hill wrote:
  Common 60mW lasers were sufficient for the task.

60mW! "Do not look into laser with your remaining eye".
Click to expand...

Typically you only get small dot dash scarring with that sort of power
level unless you are unusually stupid or very unlucky. Our lab
technicians used to get the odd retinal laser burn from visually
aligning visible lasers in the optics class. Back in the days of open
power beams on the bench which would today all have to be inside pipes.
As as aside, the authors note in section II-G:
"However, despite the regulation, there are reports of high-
 power class 3B and 4 systems being openly sold as “laser
 pointers” [34]. Indeed, while purchasing laser pointers from
 Amazon and eBay, we have discovered a troubling discrepancy
 between the rated and actual power of laser products. While
 the labels and descriptions of most products stated an output
 power of 5 mW, the actual measured power was sometimes as
 high as 1 W (i.e., ×200 above the allowable limit)."
Click to expand...

The scary ones are the laser pens 532nm green frequency doubled IR NdYAG
1064nm where to cut the price they have omitted the IR blocking filter
so there is perhaps 5mW of green and 500mW of IR pump radiation emitted.

Various online sites will happily sell members of the public laser pens
that are powerful enough to pop balloons (ie. dangerous power levels).

--
Regards,
Martin Brown
 
On 05/11/19 02:10, Winfield Hill wrote:
> Common 60mW lasers were sufficient for the task.

60mW! "Do not look into laser with your remaining eye".

As as aside, the authors note in section II-G:
"However, despite the regulation, there are reports of high-
power class 3B and 4 systems being openly sold as “laser
pointers” [34]. Indeed, while purchasing laser pointers from
Amazon and eBay, we have discovered a troubling discrepancy
between the rated and actual power of laser products. While
the labels and descriptions of most products stated an output
power of 5 mW, the actual measured power was sometimes as
high as 1 W (i.e., ×200 above the allowable limit)."
 
On 05/11/19 13:24, Martin Brown wrote:
On 05/11/2019 13:05, Tom Gardner wrote:
On 05/11/19 02:10, Winfield Hill wrote:
  Common 60mW lasers were sufficient for the task.

60mW! "Do not look into laser with your remaining eye".

Typically you only get small dot dash scarring with that sort of power level
unless you are unusually stupid or very unlucky. Our lab technicians used to get
the odd retinal laser burn from visually aligning visible lasers in the optics
class. Back in the days of open power beams on the bench which would today all
have to be inside pipes.
Click to expand...

I'm sensitive to that kind of possibility, since I'm very
deaf and blindness would be a death sentence.



As as aside, the authors note in section II-G:
"However, despite the regulation, there are reports of high-
  power class 3B and 4 systems being openly sold as “laser
  pointers” [34]. Indeed, while purchasing laser pointers from
  Amazon and eBay, we have discovered a troubling discrepancy
  between the rated and actual power of laser products. While
  the labels and descriptions of most products stated an output
  power of 5 mW, the actual measured power was sometimes as
  high as 1 W (i.e., ×200 above the allowable limit)."

The scary ones are the laser pens 532nm green frequency doubled IR NdYAG 1064nm
where to cut the price they have omitted the IR blocking filter so there is
perhaps 5mW of green and 500mW of IR pump radiation emitted.

Various online sites will happily sell members of the public laser pens that are
powerful enough to pop balloons (ie. dangerous power levels).
Click to expand...

Yup :(

Many hobbyists "repurpose" blue (bluray?) lasers as engravers.
If they are clued up *they* might have a single pair of goggles
of unknown provenance.
 
On 5/11/2019 11:39 pm, Clive Arthur wrote:
On 05/11/2019 12:13, Sylvia Else wrote:
On 5/11/2019 1:10 pm, Winfield Hill wrote:
  Laser-Based Audio Injection on Voice-Controllable Systems

https://it.slashdot.org/story/19/11/04/2054230/with-a-laser-researchers-say-they-can-hack-alexa-google-home-or-siri


https://lightcommands.com/

https://lightcommands.com/20191104-Light-Commands.pdf

  Common 60mW lasers were sufficient for the task.



Never mind lasers. What about shouting "OK Google Open the door"
through the window?

Sylvia.

"I'm sorry, Dave, I'm afraid I can't do that."

Cheers
Click to expand...

That's showing your age.

And mine.

Sylvia.
 
On Tue, 05 Nov 2019 12:39:37 +0000, Clive Arthur wrote:

> "I'm sorry, Dave, I'm afraid I can't do that."

"I can't *allow you to* do that." IIRC




--
This message may be freely reproduced without limit or charge only via
the Usenet protocol. Reproduction in whole or part through other
protocols, whether for profit or not, is conditional upon a charge of
GBP10.00 per reproduction. Publication in this manner via non-Usenet
protocols constitutes acceptance of this condition.
 
On Tuesday, November 5, 2019 at 8:25:01 PM UTC-5, Cursitor Doom wrote:
On Tue, 05 Nov 2019 12:39:37 +0000, Clive Arthur wrote:

"I'm sorry, Dave, I'm afraid I can't do that."

"I can't *allow you to* do that." IIRC
Click to expand...

"Hal, open the pod bay doors."

--

Rick C.

-+ Get 1,000 miles of free Supercharging
-+ Tesla referral code - https://ts.la/richard11209
 
On Tuesday, November 5, 2019 at 10:44:37 AM UTC-5, Tom Gardner wrote:
On 05/11/19 13:24, Martin Brown wrote:
On 05/11/2019 13:05, Tom Gardner wrote:
On 05/11/19 02:10, Winfield Hill wrote:
  Common 60mW lasers were sufficient for the task.

60mW! "Do not look into laser with your remaining eye".

Typically you only get small dot dash scarring with that sort of power level
unless you are unusually stupid or very unlucky. Our lab technicians used to get
the odd retinal laser burn from visually aligning visible lasers in the optics
class. Back in the days of open power beams on the bench which would today all
have to be inside pipes.

I'm sensitive to that kind of possibility, since I'm very
deaf and blindness would be a death sentence.
Click to expand...

Too bad you can't share that thought with Helen Keller.

--

Rick C.

-- Get 1,000 miles of free Supercharging
-- Tesla referral code - https://ts.la/richard11209
 
On Tuesday, November 5, 2019 at 4:31:43 AM UTC-5, Cursitor Doom wrote:
On Mon, 04 Nov 2019 18:10:59 -0800, Winfield Hill wrote:

Laser-Based Audio Injection on Voice-Controllable Systems

https://it.slashdot.org/story/19/11/04/2054230/with-a-laser-researchers-
say-they-can-hack-alexa-google-home-or-siri

https://lightcommands.com/

https://lightcommands.com/20191104-Light-Commands.pdf

Common 60mW lasers were sufficient for the task.

ISTR many decades ago it was postulated that a laser (still almost in the
realms of SciFi back then) could be used to bounce light off a suspect's
window to a photodetector, enabling the sound vibrations from within the
room to be captured. So this isn't really anything new.
Click to expand...

Postulated??? It's been done many times and some considerable time ago.

--

Rick C.

+ Get 1,000 miles of free Supercharging
+ Tesla referral code - https://ts.la/richard11209
 
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