my question is: How will you know me as the sender of the BTCif I choose another adress than the emergency one? I do not get it..please enlighten me
Each account have uniq btc address. All money sent to this address will be deposited to your account. Emergency address is for case when some disaster happen (read, some government agency do a raid to data center and steal whole rack of servers instead of just one offending... =)). Server stores only small amount of bitcoins. Therefore it will be possible to return most of 'em in case of server problems.