Back in 2013, US officials accused Iranian hackers of breaking into the Navy's computers. Now, US cyber security firm Cylance says it has evidence to prove that the same team has infiltrated not just the Navy, but also various top companies across the globe within the past two years. An 86-page report published by the firm says the state-sponsored group has hacked more than 50 aerospace companies, airlines, petrol and energy firms, universities and hospitals, among other entities. Among them, ten are reportedly based in the US, while others are based in China, England, France, Germany, India, Israel, Mexico and South Korea. The report didn't name any of them, but a Reuters source listed these corporations in particular: California power company Calpine Corp, Saudi Arabia's petroleum and gas company Aramco, Mexican-state-owned Petroleos Mexicanos or Pemex, Qatar Airlines and Korean Air.