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Index › Programming Questions & Help › Syntax Questions › True Random Numbers
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True Random Numbers (Read 575 times)
stefan.veen
True Random Numbers
May 12th, 2008, 12:56pm  
hi all,

I asked myself, how a technical setup for generating true random numbers for Processing should look like.

Atmospheric Receiver - Serial Board - Processing
FM Radio - Audio IN - Processing
Online Based Service - Java Class - Processing

Or would you recommend an Online-Based Service like http://random.irb.hr/. I wonder how the integration with Processing would work out.

Or does anyone know a simpler way to generate a true random integration in processing ?
Have there been any attempts in this yet ?

Thanx for your Opinion,
stefan
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movax
Re: True Random Numbers
Reply #1 - May 12th, 2008, 10:38pm  
I actually wrote a paper on this once-

You could take a signal from one of these (or all of these combined) Then run it through some chaos function.:

1. microphone input noise
2. accelerometers (macbook only)
3. atmospheric light sensor (macbook only)
4. on board camera
5. special hardware - as you mentoined
6. low level HW (state of memory, cpu temperature)
7. user input (time between clicks/keystrokes)

Depends on the application obviously, and whether you need it continuously updating or just a single seed etc.  Whats it for?
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stefan.veen
Re: True Random Numbers
Reply #2 - May 12th, 2008, 11:02pm  
hi movax,

Regarding your question. I'd like to have true random on some color changing objects, which shall kinda encrypt information with no theoretical way to decrypt it.

Can you leed deeper in the subject of a chaos function in combination with Processing and an input ?

I came across TRNG USB sticks based on capacitors. This solution sounds at all good to me. My imagination just stops at this point. How to get the numbers delivered from the TRNG (USB) into Processing. Saving it to a textfile and having Processing to read it doesn't seem to be a fast solution.

My questions circles concretely around: Where will the random information get stored and trough which way will processing be able to pick it up ?

Thanx
stefan
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jasongetsdown
Re: True Random Numbers
Reply #3 - May 13th, 2008, 5:06pm  
The http://random.irb.hr/ site has a JAVA class you can download and probably just include and use right in Processing. Scroll down to "user-contributed downloads."
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PhiLho 
Re: True Random Numbers
Reply #4 - May 13th, 2008, 6:39pm  
Except perhaps for encryption, algorithms like Mersenne Twister are good enough for most uses.
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stefan.veen
Re: True Random Numbers
Reply #5 - Jun 7th, 2008, 4:48pm  
Thanx jason and PhiLo,

I've tried to intregrate the Unlekker-Library from Marius Watz trough dropping it in the libraries folder and write in the beginning of the script "import unlekker.util.*;".

I don't really get how to catch the syntax of the library. From the Classes Overview it seems like, it's the same as the original random function of processing.
http://workshop.evolutionzone.com/files/unlekkerLibDoc/

float r = random(0, 5);

Does the lib automatically overwrite the default random or will i need to call it with another syntax, for example: randomUnlekk(0, 5); or something similar.

Thanx for help
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PhiLho 
Re: True Random Numbers
Reply #6 - Jun 8th, 2008, 12:04am  
From the JavaDoc of this library, you have to instanciate an object to use it:
Rnd rand = new Rnd();
float rf = rand.random(0f, 5f);
int ri = rand.random(0, 5);
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