You can build new social network with only user/password/email db table and other user information can save on friend`s local machine, like that happen in Skype. Me ( Addy ) --> My friend My contacts | Friend contacts Marry (20) | Addy (25) May (17) | Janny (25) Janny (25) | Freddy (40) Chris (15) | Monica (18)
All information saves only on local machine and their friend`s local machines (encoded|enscripted)
