No truly random numbers can be generated by any algorithm.
To get true random, you must e.g. digitize white noise.
One method I have used with some succes is to have a very fast (50MHz)overflowing counter running and then stop it when a key was pressed, this seems to be truly random (I'm sure there is a means of (dis)proving that, I just does not know of it).
A means of obtaining a longer (almost) true random with fewer bits in the index is used in the CDMA phone system: you generate a truly random very long word (I do not recall, but more than 1 kbits) once and obtain your random value by indexing bitwise into it.

Do a random act of kindness, it helps

Erik