GFSK security

Book · Post by **Book** » Mon Sep 24, 2007 7:39 am

Hey,

I've read that GFSK is a frequency shifting technology, but I was wondering, is that technology implemented to improve security or is it just a way of transmiting data (like FM radio, which is also frequency modulating) and maybe achieving better quality or higher speeds. Because I have a cordless phone that uses GFSK, is it possible that someone could decrypt my conversations?

telcontar · Post by **telcontar** » Mon Sep 24, 2007 9:07 am

AFAIK, the signal is passed through a gaussian filter for pulse shaping ("for keeping stuff in it's frequency band"), that is, for signal bandwidth control, not security.

A quick google would've told you i thinks

Book · Post by **Book** » Mon Sep 24, 2007 10:41 am

Yes, actually the FSK (frequency shift keying) part is most possibly responsible for security (because it shifts the frequency at which it's broadcasting.

DigitolJedi · Post by **DigitolJedi** » Mon Sep 24, 2007 2:31 pm

book you are mistaken. It's too limit bandwith which means less distortion in the signal. Less dropped packets less time taken to download.

Book · Post by **Book** » Sun Oct 28, 2007 5:27 pm

Yes, but still, if it changes the frequency in which the signals are transmitted, won't that make it harder for someone to intercept the signal?