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Events on Wednesday 20 April 2011 1
2011PlayStation Network hack — 77 million accounts compromisedSony's PlayStation Network is hacked in April 2011 — one of the largest data breaches in history at the time, compromising the personal information of 77 million accounts including names, addresses, email addresses and potentially credit card numbers. Sony takes PSN offline for 23 days. The breach costs Sony over $170 million in direct costs. The reputational damage is severe; Sony faces lawsuits in multiple jurisdictions. The hack exposes serious security vulnerabilities in Sony's online infrastructure.