In July 2011, SK Communications was hacked in one of the largest data breaches in South Korea's history. The attack, which is believed to have been conducted from Chinese IP addresses, had compromised SK Communication’s update server as its reached out to its supplier for a routine check up, according to the analysis, effectively turning the company’s security procedures into a vulnerability. Hackers used vulnerabilities in the system to gain access to the personal data and IDs of 35 million Nate and CyWorld social network users. The attack currently stands as 10th on
DataLossDB’s list of largest all-time breaches with 35 million people affected.In February 2013 a Seoul court has ruled that SK Communications should pay KRW 200,000 ($185.48) in damages to each ID theft victim in a class action lawsuit against SK Communications filed by 2,737 ID theft victims. On the ruling court said, Internet
security firms
ESTsoft and
Symantec who provided security software to SK Communications were also named defendants in the case, however the court found that they were not liable for damages. ==See also==