How to generate cryptographically random numbers?

I want to know how can we generate a list of different random numbers in c.?

• I want to know how can we generate a list of different random numbers in c. is there any function in c which can automaticaaly generate a list of different random numbers . plz help me.

• Answer:

  #include <stdio.h> #include <stdlib.h> #include <time.h> int main (int argc, char *argv[]) { /* Simple "srand()" seed: just use "time()" */ unsigned int iseed = (unsigned int)time(NULL); srand (iseed); /* Now generate 5 pseudo-random numbers */ int i; for (i=0; i<5; i++) { printf ("rand[%d]= %u\n", i, rand ()); } return 0; } This will produce five random numbers using the system clock as the seed. This ensures running back to back, the same random numbers are not generated. HTH - Good Luck, -Aaron