It could be combined with the entropy of the exact time a random number request was made, along with additional pseudo random number from the server, hash the result, grab some random parameters from that, go get some random feed from online that is also changing in real time, hash that, and you have a pretty doggone random number that no one could arrive at even if they had your source code.
That sounds awful complex. Wouldn't a simple piece of open source software and some easy to acquire hardware be a simpler and more reliable solution?