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KC2UGV
09-09-2010, 12:37 PM
Would the output from one of the websdr's out there be a valid source for randomness, or would I need an sdr to get one?

Would ELF/VLF region be a valid source (I have a ELF/VLF SDR)?

KG4CGC
09-09-2010, 01:14 PM
I want to see it.

I have a ELF/VLF SDR

WTKX
09-09-2010, 01:33 PM
[/URL]
White, pink, or brown? [URL]http://simplynoise.com/ (http://forums.hamisland.net/world.std.com/%7Ereinhold/truenoise.html)

KG4CGC
09-09-2010, 01:35 PM
I'd like to have a VLF SDR.

KC2UGV
09-09-2010, 01:39 PM
I want to see it.

http://www.g4ilo.com/uploaded_images/saqrx-728628.gif
http://www.g4ilo.com/uploaded_images/saqrx-728628.gif%3C/a%3E

(http://www.g4ilo.com/uploaded_images/saqrx-728628.gif)Adding up to 44KHz is sound card dependent.

KG4CGC
09-09-2010, 08:43 PM
OK, you have to tell me what you're using.
:)

KC2UGV
09-10-2010, 11:20 AM
[/URL]
White, pink, or brown? [URL]http://simplynoise.com/ (http://forums.hamisland.net/world.std.com/%7Ereinhold/truenoise.html)

I would think white noise would be the thing (Since it's power is equally distributed over the spectrum), but I need a constant source.


OK, you have to tell me what you're using.
:)

SAQ VLF Receiver + Sound card + Antenna connected to the mic-in port. The software's download link is busted, you you can use SpectrumLab to do the same thing.

KG4CGC
09-10-2010, 05:37 PM
All I can find on that is that you connect the ant to your soundcard and use some software. I did that sans software in 2002. Soundcard hasn't been the same since. Stuff I heard was anything on the grid based on what the neighbors were doing. Toasters and hair dryers are interesting. Some microwave ovens are really dirty. Yes, microwave ovens are broadbanded. Some are.

WTKX
09-10-2010, 06:01 PM
http://simplynoise.com/

http://www.random.org/audio-noise/

:dunno:

n2ize
09-14-2010, 01:29 PM
To create a random number generator you could also use a Geiger Counter and a small radioactive point source. An old radium watch dial, a piece of uranium ore, or a standard low level point source. In the probability lab we used this kit..

http://www.elexp.com/kit_2645.htm

along with an old radium clock face.

KC2UGV
09-14-2010, 01:41 PM
All I can find on that is that you connect the ant to your soundcard and use some software. I did that sans software in 2002. Soundcard hasn't been the same since. Stuff I heard was anything on the grid based on what the neighbors were doing. Toasters and hair dryers are interesting. Some microwave ovens are really dirty. Yes, microwave ovens are broadbanded. Some are.

Basically, that's it for the VLF SDR :) Antenna into the sound card, and the software demodulates it.


http://simplynoise.com/

http://www.random.org/audio-noise/

:dunno:

random.org might be the way to go here. Thanks, because it seems you can write a client to grab random blocks of data. I just need 8-32 chars at a time (One-time PAD).


To create a random number generator you could also use a Geiger Counter and a small radioactive point source. An old radium watch dial, a piece of uranium ore, or a standard low level point source. In the probability lab we used this kit..

http://www.elexp.com/kit_2645.htm

along with an old radium clock face.

That might be the next route I go, if I end up needing a large number of PADs, random.org does't like large sets constantly.

n2ize
09-14-2010, 04:24 PM
Basically, that's it for the VLF SDR :) Antenna into the sound card, and the software demodulates it.



random.org might be the way to go here. Thanks, because it seems you can write a client to grab random blocks of data. I just need 8-32 chars at a time (One-time PAD).



That might be the next route I go, if I end up needing a large number of PADs, random.org does't like large sets constantly.

What are you into the spy business ? :)

WTKX
09-14-2010, 04:54 PM
He wants to restore one of radio's biggest hits...

-. ... ...

-. ... ...

-. ... ...

K6BSO
09-14-2010, 05:14 PM
"NSS"?

What am I missing?

KC2UGV
09-15-2010, 09:11 AM
What are you into the spy business ? :)

It's so I can remotely admin a Linux packet node. My callsign can log in without a password, but has no admin privileges. My actual user account is a member of "wheel", and it requires a password.

Since the password is sent in clear text (As required by law), a one-time pad for passwords would be the next best bet. And, I don't want to have to buy an RSA dongle :)

ab1ga
09-15-2010, 02:28 PM
It's so I can remotely admin a Linux packet node. My callsign can log in without a password, but has no admin privileges. My actual user account is a member of "wheel", and it requires a password.

Since the password is sent in clear text (As required by law), a one-time pad for passwords would be the next best bet. And, I don't want to have to buy an RSA dongle :)

Corey, you may want to check the regs again, since there may be some exceptions. If there weren't, then the command channels of amateur satellites would be cleartext and subject to hijack. True, the Amateur Satellite Service is distinct from the Amateur Service, but the regs are almost all shared, with few exceptions.

The encryption rule is intended to prevent hiding bulk data content, but the regulations also state that a remote station may be controlled by a wireless link, and good engineering practice would dictate using a method which discourages unauthorized persons from gaining control of the station.

And hell, if the rules don't explicitly allow the practice, they should, and a Request for Rulemaking wouldn't be out of place, either.

73,

K6BSO
09-15-2010, 02:44 PM
As I recall, it's also okay to encrypt signals intended for remote controlled devices. While I think RC is generally considered to mean a remote controlled airplane or something similar, it could also apply in your case.

KC2UGV
09-15-2010, 02:52 PM
Corey, you may want to check the regs again, since there may be some exceptions. If there weren't, then the command channels of amateur satellites would be cleartext and subject to hijack. True, the Amateur Satellite Service is distinct from the Amateur Service, but the regs are almost all shared, with few exceptions.

The encryption rule is intended to prevent hiding bulk data content, but the regulations also state that a remote station may be controlled by a wireless link, and good engineering practice would dictate using a method which discourages unauthorized persons from gaining control of the station.

And hell, if the rules don't explicitly allow the practice, they should, and a Request for Rulemaking wouldn't be out of place, either.

73,

I think you might be correct here. I think this might fall under "Telecommand"... Some more reading... Thanks :)

WTKX
09-15-2010, 02:59 PM
"NSS"?

What am I missing?

You're making me feel old, man. :neener:

W W W VVV VVV VVV DE NSS NSS NSS (http://en.wikipedia.org/wiki/NSS_Annapolis)

K6BSO
09-15-2010, 03:04 PM
You're making me feel old, man. :neener:

W W W VVV VVV VVV DE NSS NSS NSS (http://en.wikipedia.org/wiki/NSS_Annapolis)

Well, you are old, OM!

Actually, being a life-long Left Coaster, I wasn't aware of this.

[EDIT: you're actually slightly younger than I am.]

n2ize
09-15-2010, 06:44 PM
It's so I can remotely admin a Linux packet node. My callsign can log in without a password, but has no admin privileges. My actual user account is a member of "wheel", and it requires a password.

Since the password is sent in clear text (As required by law), a one-time pad for passwords would be the next best bet. And, I don't want to have to buy an RSA dongle :)

OK... good use for a 1 time key.

K6BSO
09-15-2010, 06:46 PM
OK... good use for a 1 time key.

The best encryption scheme there is. If it's done right, it is unbreakable. Use a key more then once, though, and you're f*ucked.

n2ize
09-15-2010, 10:42 PM
The best encryption scheme there is. If it's done right, it is unbreakable. Use a key more then once, though, and you're f*ucked.

True... but not the most practical encryption scheme for day to day transactions.