I don't think someone can generate new address that actually used by another user before.
The chance getting this is very very small
The length of private key is make sure there are so many bitcoin address out there
The chance getting this is very very small
The length of private key is make sure there are so many bitcoin address out there
ha ha ha, why you use this smiley? ->
it seems you have the wish, to generate (brute force) a address of your choice somehow ^^ right?