2011 Sony Group — multi-division breaches including PlayStation Network disruption and later exposures (HIBP ‘Sony’ disclosure; wider PSN reporting)
Data compromised
Mixed across incidents—may include account credentials, contact/PII fields, and online identifiers per source-specific disclosures.
Technical writeup
Public histories of 2011 Sony incidents span the large-scale PlayStation Network compromise and outage and other Sony-facing compromises summarized in contemporaneous reporting and later compilations. Have I Been Pwned’s ‘Sony’ entry discusses multiple 2011-era exposures spanning web properties; treat victim population estimates as incident-specific and not interchangeable.
Root cause
Varied by division and system (credential theft, SQL injection narratives in HIBP summary, and PSN-specific attacker activity per contemporaneous reporting).