Can hackers behind the ransomware WannaCry be traced through bitcoin transactions? Can hackers behind the ransomware WannaCry be traced through bitcoin transactions? Is there is central server of Bitcoin where all transactions can be looked up from? And is it possible to identify hackers from IP address used to access their Bitcoin accounts?
Can hackers behind the ransomware WannaCry be traced through bitcoin
  transactions?


no, if they are smart enough


  Is there is central server of bitcoin


no


  where all transactions can be looked up from?


yes


  And is it possible to identify hackers from IP address used to access
  their bitcoin accounts?


no