5 Lessons In How Not To Handle A Security Breach

2011: Epsilon

Email marketing firm Epsilon became the poster child for third-party data breaches when hackers gained access to millions of customer emails from at least 50 of its clients. Epsilon did not detect the attack until two months after spearphishing email messages reportedly targeted Walgreens customers. The Epsilon breach caused a cascade of announcements from Best Buy, JPMorgan Chase, CitiGroup, L.L. Bean and other firms warning their customers that they could experience phishing scams and spam messages as a result of the breach.

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