Random number generation

puneetsardana88

Hi

I am generating 256 bit key for AES. I am using the following implementation

The problem with this code is that if I remove sleep it will give same keys for almost all files. But I do not want to deter performance of my module due to this. Can somebody let me know better implementation? rand_s() is not available. I am working on code blocks : mingw.


Thanks for your help

Jan 29 '12 #1

Rabbit

That's because you're seeding with the same number otherwise. You need to move on to the next number in the sequence.

Jan 29 '12 #2

puneetsardana88

Yes I am looking for a method in which I can generate randon numbers without using sleep. (with sleep i can pass different seed) but i am looking for an alternative to sleep so that performance do not deter

Jan 30 '12 #3

Rabbit

I'm saying that you're seeding with the same number each time it's called. That's why you're getting the same key. The solution is simple, just seed once, or include your loop value in the seed. You don't need sleep and you don't need an alternative to sleep. Also, you don't need to reseed everytime to get the next character.

Jan 30 '12 #4

3108balu

import java.util.Random;


public class RandomGen {

public static void main(String[] args) {

Random r=new Random();
System.out.println(r.nextInt(1001) + r.nextInt(9000));
}
}

Jan 31 '12 #5