Chinese cyber security experts believe that U.S.-based hackers were responsible for a significant increase in cyber attacks on computers within China’s borders in 2013, according to Reuters. According to China’s National Computer Network Emergency Response Coordination Centre, 15,000 computers were hit by Trojan Horse malware and 61,000 websites were attacked by hackers located outside of China. These statistics represent a 62 percent increase in 2013 compared with 2012.