Online file sharing system script?

hi guys, i was wandering does any one know any script or anything that i can create share point online on my website and only specific user can upload and download files (not torrent or anytning like that) just word/excel files.

there is one php here but its unsecure without any user name password.

I can code it for you if you like it to be coded.

^i think he must had atleast googled before posting here :-)

aqee_se i googled with every possible keyword and as you can see one link in my first post. but there is no security on that.