[A-DX] VOA Radiogram, 8-9 August 2015

[Roger]

Am 07.08.2015 um 15:25 schrieb VOA Radiogram:
>
> Hello friends,
>
> Last weekend’s comparison of images in MFSK16, MFSK32, MFSK64, and 
> SSTV Scottie DX, was interesting. In general, I think, it supports our 
> use of MFSK32 both for text and images.
>
> Here’s one example comparing the four modes: 
> http://voaradiogram.net/post/126092155122/comparing-images-in-four-modes
> This weekend on VOA Radiogram, we return to our usual MFSK32 mode, 
> except for one news item in Olivia 32-2000, which might succeed even 
> in poor reception conditions.
> Here is the lineup for VOA Radiogram, program 123, 8-9 August 2015, 
> all in MFSK32 except where noted:
>
> 1:31  Program preview
> 2:48  Facial expressions of horses*
> 8:21  Use of drones to transport blood samples*
> 14:48  Hijacking radio signals from computer accessories* 
> <=================== ??
> 20:32  Olivia 32-2000: Poll indicates Russians favor Internet censorship*
> 27:07  MFSK32: Closing announcements
> 28:08  Olivia 64-2000: VOA Radiogram transmission schedule
> * with image
>

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"...........US Researchers Show Computers Can Be Hijacked

Reuters via voanews.com
August 05, 2015

LAS VEGAS - A team of security researchers has demonstrated the
ability to hijack standard equipment inside computers, printers
and millions of other devices in order to send information out of
an office through sound waves.............

............Hackers would need an antenna close to the targeted building to
pick up the sound waves, Cui said, and they would need to find
some way to get inside a targeted machine and convert the desired
data to the format for transmission.......

Image: Red Balloon Security chief scientist Ang Cui with a medium
wave (AM) loop antenna .........."

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Receive sound waves with a medium wave antenna - funny story ....
The Scribbler has no knowledge of the physics and mixed two types of 
computer components-hijacking.

1. Hijacking of acoustic components (speakers) and sending attached 
informations as structured sound waves (ultrasound best> 18 KHz)
then you need an "antenna" which is called: directional microphone.

2. Highjacking of electromagnetic components and attaching information 
on the stray radiation -
then you need broadband RF-antennas for reception, not only a 
medium-wave loop


Such stories....also a horse grins. ;-)


http://www.rhci-online.net/radiogram/VoA_Radiogram_2015-08-08.htm#VOA






roger










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