There are no possible solutions to ensure full-proof security and prevent future cyber attacks.

The security firm says that even companies that have made responsible and sustained investments in IT and have up-to-date anti-virus software continue to be targeted by hackers. Mandiant said, “The attackers get smarter and change tactics all the time.” They have sent out an ‘FBI alert’ to companies in the entertainment sector, describing the characteristics of the so-called ‘wiper malware’ used in the attack.
The incident is being investigated by the FBI.
Source-Medindia