Random numbers (emphasis on seeding the number)
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A thought came to me today about random seed generation. I googlied a bit but found nothing (using image data)...still could be there. You have a series of images. you count the pixels and use that as your random seed. Delete the image. The images are constantly being replenished by new images of all shapes and sizes and formats from the internet or scanned in or whatever. I would "think", that if the images were gathered...at random...with no care at all, the seed value would be random and not predictable. I am not a crypto guru so you can laugh all you want. :)
Just along for the ride. "the meat from that butcher is just the dogs danglies, absolutely amazing cuts of beef." - DaveAuld (2011)
"No, that is just the earthly manifestation of the Great God Retardon." - Nagy Vilmos (2011)How about...
public static Int32 random(Int32 lowerBound, Int32 upperBound) { Int32 range = (upperBound++) - lowerBound; byte[] seed = Guid.NewGuid().ToByteArray(); RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider(seed); byte[] sequence = new byte[1]; rng.GetBytes(sequence); return (Int32)(sequence[0] % range) + lowerBound; }Kevin Rucker, Application Programmer QSS Group, Inc. United States Coast Guard OSC Kevin.D.Rucker@uscg.mil "Programming is an art form that fights back." -- Chad Hower
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How about...
public static Int32 random(Int32 lowerBound, Int32 upperBound) { Int32 range = (upperBound++) - lowerBound; byte[] seed = Guid.NewGuid().ToByteArray(); RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider(seed); byte[] sequence = new byte[1]; rng.GetBytes(sequence); return (Int32)(sequence[0] % range) + lowerBound; }Kevin Rucker, Application Programmer QSS Group, Inc. United States Coast Guard OSC Kevin.D.Rucker@uscg.mil "Programming is an art form that fights back." -- Chad Hower
There is no perfect Random generator. All I was doing was getting community feedback on an idea I was toying with on "seeding" RNG's. The whole idea being that you cannot generate the seed. The seed has to be random. Well, how do you get random? My idea was to use some sort of random "image/picture" grab from the net and use the pixel count of that image as your seed. I'm sure color count or something similar could be used as well...as long as you are not in monochrome format or the like. Thanks for the suggestion.
Just along for the ride. "the meat from that butcher is just the dogs danglies, absolutely amazing cuts of beef." - DaveAuld (2011)
"No, that is just the earthly manifestation of the Great God Retardon." - Nagy Vilmos (2011) -
jschell wrote:
Do you see any circles there?
do you because I don't. The images are random by nature. I don't create the randomness in that, the internet does. I use that natural randomness of the images to seed my random number. The only thing I am creating is the final random number.
Just along for the ride. "the meat from that butcher is just the dogs danglies, absolutely amazing cuts of beef." - DaveAuld (2011)
"No, that is just the earthly manifestation of the Great God Retardon." - Nagy Vilmos (2011)You seem to assume that the randomness of the content of pictures from the internet in general makes your specific pick somehow random. It doesn't! Unless you use some kind of random element, you will pick a very specific picture from a very specific URL, and every other person doing the same will get exactly the same image if following that algorithm. The only random element here is the point in time that you choose to select and download that picture (and even that will only make a difference if you're talking about some image feed channel like you mentioned). So, in the end, you've based your random number on the current time, just like everyone else! :)
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You seem to assume that the randomness of the content of pictures from the internet in general makes your specific pick somehow random. It doesn't! Unless you use some kind of random element, you will pick a very specific picture from a very specific URL, and every other person doing the same will get exactly the same image if following that algorithm. The only random element here is the point in time that you choose to select and download that picture (and even that will only make a difference if you're talking about some image feed channel like you mentioned). So, in the end, you've based your random number on the current time, just like everyone else! :)
Actually, no. If you have ever been on 4Chan then you would understand what I am talking about. You also need to know that there is no way for you to grab the image at the same time I am because you have no idea when I'm grabbing it. Images on 4Chan come and go (get moved or deleted) every second. If you don't know when I am going to grab that image, then you have no idea what my seed value was or is.
Just along for the ride. "the meat from that butcher is just the dogs danglies, absolutely amazing cuts of beef." - DaveAuld (2011)
"No, that is just the earthly manifestation of the Great God Retardon." - Nagy Vilmos (2011) -
A thought came to me today about random seed generation. I googlied a bit but found nothing (using image data)...still could be there. You have a series of images. you count the pixels and use that as your random seed. Delete the image. The images are constantly being replenished by new images of all shapes and sizes and formats from the internet or scanned in or whatever. I would "think", that if the images were gathered...at random...with no care at all, the seed value would be random and not predictable. I am not a crypto guru so you can laugh all you want. :)
Just along for the ride. "the meat from that butcher is just the dogs danglies, absolutely amazing cuts of beef." - DaveAuld (2011)
"No, that is just the earthly manifestation of the Great God Retardon." - Nagy Vilmos (2011)If you want true randomness, use hardware-based random number generators[^]. :) The RNG in this article is based on thermal noise on your personal hardware, so anyone trying to duplicate your sequence of random numbers will need to have physical access to your hardware. P.S.: you could probably build something like this yourself if you can read the temperature from certain hardware components, such as your graphics core - I know there is software that can display such values, so it must be possible to read them.
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If you want true randomness, use hardware-based random number generators[^]. :) The RNG in this article is based on thermal noise on your personal hardware, so anyone trying to duplicate your sequence of random numbers will need to have physical access to your hardware. P.S.: you could probably build something like this yourself if you can read the temperature from certain hardware components, such as your graphics core - I know there is software that can display such values, so it must be possible to read them.
This is what I am talking about. Thanks for the link. My belief as well as others is that, you have to get your seed from a random occurring event. You can't create the seed, it has to be created for you. This really was my argument, I just don't put down my thoughts very well sometimes. Again, thanks for the link. :thumbsup:
Just along for the ride. "the meat from that butcher is just the dogs danglies, absolutely amazing cuts of beef." - DaveAuld (2011)
"No, that is just the earthly manifestation of the Great God Retardon." - Nagy Vilmos (2011) -
A thought came to me today about random seed generation. I googlied a bit but found nothing (using image data)...still could be there. You have a series of images. you count the pixels and use that as your random seed. Delete the image. The images are constantly being replenished by new images of all shapes and sizes and formats from the internet or scanned in or whatever. I would "think", that if the images were gathered...at random...with no care at all, the seed value would be random and not predictable. I am not a crypto guru so you can laugh all you want. :)
Just along for the ride. "the meat from that butcher is just the dogs danglies, absolutely amazing cuts of beef." - DaveAuld (2011)
"No, that is just the earthly manifestation of the Great God Retardon." - Nagy Vilmos (2011)You could put a microphone on your local sewer dump, record the random crap splash sounds and from there seed your random crap number generator. :laugh: That basic need can be unpleasantly random.
"To alcohol! The cause of, and solution to, all of life's problems" - Homer Simpson
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You could put a microphone on your local sewer dump, record the random crap splash sounds and from there seed your random crap number generator. :laugh: That basic need can be unpleasantly random.
"To alcohol! The cause of, and solution to, all of life's problems" - Homer Simpson
Although your post was geared to be funny, and it was, it proves my point. Using digital output from anything around us in the physical world and the digital world would work.
Just along for the ride. "the meat from that butcher is just the dogs danglies, absolutely amazing cuts of beef." - DaveAuld (2011)
"No, that is just the earthly manifestation of the Great God Retardon." - Nagy Vilmos (2011) -
The capacity is limited to only three numbers (2,3 and 6). How's that random? ;P
Chris Meech I am Canadian. [heard in a local bar] In theory there is no difference between theory and practice. In practice there is. [Yogi Berra] posting about Crystal Reports here is like discussing gay marriage on a catholic church’s website.[Nishant Sivakumar]
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Although your post was geared to be funny, and it was, it proves my point. Using digital output from anything around us in the physical world and the digital world would work.
Just along for the ride. "the meat from that butcher is just the dogs danglies, absolutely amazing cuts of beef." - DaveAuld (2011)
"No, that is just the earthly manifestation of the Great God Retardon." - Nagy Vilmos (2011)I guess you're right. Random it will be. And I tend to believe that nothing is more random than nature (if it is at all), in your case, pictures taken and uploaded by people (nature). I'd just use another method, instead of dimensions, I'd get a few pixels from the pictures and with some sort of algorithm, create the seed. If security is not a concearn, than both our methods would work. The difference is, your are not so nasty.
"To alcohol! The cause of, and solution to, all of life's problems" - Homer Simpson
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A thought came to me today about random seed generation. I googlied a bit but found nothing (using image data)...still could be there. You have a series of images. you count the pixels and use that as your random seed. Delete the image. The images are constantly being replenished by new images of all shapes and sizes and formats from the internet or scanned in or whatever. I would "think", that if the images were gathered...at random...with no care at all, the seed value would be random and not predictable. I am not a crypto guru so you can laugh all you want. :)
Just along for the ride. "the meat from that butcher is just the dogs danglies, absolutely amazing cuts of beef." - DaveAuld (2011)
"No, that is just the earthly manifestation of the Great God Retardon." - Nagy Vilmos (2011) -
There is no perfect Random generator. All I was doing was getting community feedback on an idea I was toying with on "seeding" RNG's. The whole idea being that you cannot generate the seed. The seed has to be random. Well, how do you get random? My idea was to use some sort of random "image/picture" grab from the net and use the pixel count of that image as your seed. I'm sure color count or something similar could be used as well...as long as you are not in monochrome format or the like. Thanks for the suggestion.
Just along for the ride. "the meat from that butcher is just the dogs danglies, absolutely amazing cuts of beef." - DaveAuld (2011)
"No, that is just the earthly manifestation of the Great God Retardon." - Nagy Vilmos (2011)Absolutely true, there is no perfect random number generator. I was just showing an example of using the Windows Guid generator (pretty darn random) to seed the RNG. Really it's kind of a moot point, in that, according to MSDN the RNG seed value is ignored in the present implementation. It uses some undisclosed seeding method internal to the constructor.
Kevin Rucker, Application Programmer QSS Group, Inc. United States Coast Guard OSC Kevin.D.Rucker@uscg.mil "Programming is an art form that fights back." -- Chad Hower
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Actually, no. If you have ever been on 4Chan then you would understand what I am talking about. You also need to know that there is no way for you to grab the image at the same time I am because you have no idea when I'm grabbing it. Images on 4Chan come and go (get moved or deleted) every second. If you don't know when I am going to grab that image, then you have no idea what my seed value was or is.
Just along for the ride. "the meat from that butcher is just the dogs danglies, absolutely amazing cuts of beef." - DaveAuld (2011)
"No, that is just the earthly manifestation of the Great God Retardon." - Nagy Vilmos (2011)You didn't get my meaning - my point was not whether I know or not when you're grabbing it, but that the only random component in your 'algorithm' is exactly that: when you're grabbing it. And that's a time stamp. So you can just as well use that time stamp as your seed.
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You didn't get my meaning - my point was not whether I know or not when you're grabbing it, but that the only random component in your 'algorithm' is exactly that: when you're grabbing it. And that's a time stamp. So you can just as well use that time stamp as your seed.
I'm not using time at all. I am using the image properties. I don't care about the time. It is not even part of the equation. I would never use time to seed a rng.
Just along for the ride. "the meat from that butcher is just the dogs danglies, absolutely amazing cuts of beef." - DaveAuld (2011)
"No, that is just the earthly manifestation of the Great God Retardon." - Nagy Vilmos (2011) -
Isn't
rand(42);
random enough for you. :cool:
Chris Meech I am Canadian. [heard in a local bar] In theory there is no difference between theory and practice. In practice there is. [Yogi Berra] posting about Crystal Reports here is like discussing gay marriage on a catholic church’s website.[Nishant Sivakumar]
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A thought came to me today about random seed generation. I googlied a bit but found nothing (using image data)...still could be there. You have a series of images. you count the pixels and use that as your random seed. Delete the image. The images are constantly being replenished by new images of all shapes and sizes and formats from the internet or scanned in or whatever. I would "think", that if the images were gathered...at random...with no care at all, the seed value would be random and not predictable. I am not a crypto guru so you can laugh all you want. :)
Just along for the ride. "the meat from that butcher is just the dogs danglies, absolutely amazing cuts of beef." - DaveAuld (2011)
"No, that is just the earthly manifestation of the Great God Retardon." - Nagy Vilmos (2011)I use ranGens allot for simulated hardware. My seed solution that never fails. Random number seeded with QueryPerformanceCounter and then reseeding random number and using the random number from the last seed as a Mod on a new call to QPCntr.
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jschell wrote:
Do you see any circles there?
do you because I don't. The images are random by nature. I don't create the randomness in that, the internet does. I use that natural randomness of the images to seed my random number. The only thing I am creating is the final random number.
Just along for the ride. "the meat from that butcher is just the dogs danglies, absolutely amazing cuts of beef." - DaveAuld (2011)
"No, that is just the earthly manifestation of the Great God Retardon." - Nagy Vilmos (2011)Slacker007 wrote:
do you because I don't.
It was explicit in the statement.
Slacker007 wrote:
The images are random by nature.
That is inprecise. There are two parts to it. 1. The content of picture A. 2. The selection of picture A in the first place. If you use a 'random' process to arrive at 2 then the methodology for 'random' in that case is open to question.
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I'm not using time at all. I am using the image properties. I don't care about the time. It is not even part of the equation. I would never use time to seed a rng.
Just along for the ride. "the meat from that butcher is just the dogs danglies, absolutely amazing cuts of beef." - DaveAuld (2011)
"No, that is just the earthly manifestation of the Great God Retardon." - Nagy Vilmos (2011)The image properties depend on the image. That part is deterministic and not random at all. The image depends on the exact time. Once you know the time, determining the image is not random at all either. It all comes down to when you grab the image, because that determines the image. when is time. It's about time you realize that.
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The image properties depend on the image. That part is deterministic and not random at all. The image depends on the exact time. Once you know the time, determining the image is not random at all either. It all comes down to when you grab the image, because that determines the image. when is time. It's about time you realize that.
I don't think you understand anything about image dumps (sites that people, all over the world, upload images to). You seem to focus on time. Time is not important here. There is no other way I can get this idea through to you. You seem to be fixated on time. Time is irrelevant here.
Stefan_Lang wrote:
The image properties depend on the image. That part is deterministic and not random at all.
wrong. every image has it's own properties. every image is different then the next. the image i grab is random; their for the properties I work from are random.
Just along for the ride. "the meat from that butcher is just the dogs danglies, absolutely amazing cuts of beef." - DaveAuld (2011)
"No, that is just the earthly manifestation of the Great God Retardon." - Nagy Vilmos (2011)