SK Communications (Hangul: SK커뮤니케이션즈 or 에스케이커뮤니케이션즈) KRX: 066270 is a South Korean tech company that owns and operates popular web portal Nate.

To gain ground in the heatedly contested search market, SK Communications acquired rival Empas for $82 million in October 2006.

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.

[8] Hackers used vulnerabilities in the system to gain access to the personal data and IDs of 35 million Nate and CyWorld social network users.

On the ruling court said, SK Communications completely failed to notice the phased theft of personally identifiable information provided by 35 million Nate and Cyworld users.