Hackers have invaded a server holding roughly 500,000 Italian certified email accounts in what one local official called the “worst attack” in nearly a year.The November 12 cyber burglary included the data records of some 9,000 high ranking government functionaries, including magistrates and members of a government-wide security authority, a Reuters report said. At this point, the cyber crew that pulled the job has not been identified but the attack is believed to have originated outside the country. It's not known what the hackers have done with the cyber loot.Roberto Baldoni, who heads Italian state cyber security, told Reuters that the damage has been contained. “This was the worst attack we have had since January this year and it has had important repercussions, but ... the situation is under control,” he said.In the attack’s immediate wake, the IT system used by Italy’s appeals courts was suspended and holders of certified email accounts were urged to change their passwords at once. Other than that, it’s too early to measure the attack’s fallout, although it may not be the work of sophisticated hackers, Baldoni said. “The only thing we know for sure is that this attack was not launched from Italy. It was a serious attack, even if, at first sight, it didn’t seem too refined from a technical perspective.” As with registered mail, certified email is validated by a neutral third-party who confirms the sender’s identity, and the date and time the item is sent and received. It carries the same legal status as registered mail, and as a result has the potential to be a data rich prize for hackers.