Amid mounting public anger, SK Telecom is struggling to regain trust following a large-scale cyberattack that compromised sensitive SIM card data.

Long queues formed outside stores for the second consecutive day, with limited SIM card availability fueling customer frustration.

Preliminary findings from a joint government-private investigation revealed the leak of key subscriber data, although device identifiers remained secure.

The breach, totaling nearly 9.7GB—equivalent to 2.7 million pages—has triggered mass subscriber migration, with over 34,000 customers switching providers in just one day.

Government authorities assured the public that users who pre-register for SIM protection will be covered retroactively, but the damage to SKT’s reputation appears substantial.

Legal actions and collective petitions are already underway, signaling a potential turning point in Korea’s telecom security standards.

🟨 Key Words:

cyberattack – 사이버 공격

compromise – 위태롭게 하다, 손상시키다

breach – 침해, 유출

migration – 이탈, 이동

retroactively – 소급적으로

petition – 청원