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SUMMARY

Personal information of 35 million users including names, email addresses, phone numbers and encrypted resident registration numbers and passwords accessed by hacker
Records	35,000,000
Record Types	SSN NAA EMA MISC MED DOB PWD ADD
Breach Type	Hack
Data Family	Electronic
Source	Outside
Organization	SK Communications
Other Affected/Involved Organizations	Nate, Cyworld
Lawsuit?	YES
Data Recovered?	NO/UNKNOWN
Arrest?	NO/UNKNOWN
Submitted By:	Dissent

Date	Event
2011-07-18	Incident Occurred
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2011-07-28	Incident Discovered By Organization
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2011-07-28	Organization Reports Incident
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None. Add Data	Organization Mails Notifications
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None. Add Data	Records Recovered
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2011-08-01	Lawsuit Filed
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None. Add Data	Arrest Made
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records	date	organizations
40,000,000	2005-06-19	CardSystems, Visa, MasterCard, American Express
94,000,000	2007-01-17	TJX Companies Inc.
90,000,000	1984-06-01	TRW, Sears Roebuck

Address: South Korea
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No known costs for this incident.

Ponemon Institute Direct Costs Estimate ¹

$2,100,000,000.00

Note that these estimates are based on the Ponemon Institute's 2009 direct costs figures from their 2009 Annual Study: Cost of a Data Breach. We multiply $60.00 by the number of records to obtain this figure. Keep in mind that depending on the breach, the direct costs are not always suffered by the breached organizations. In the case of credit card number breaches, the direct costs can often be suffered by banks and card issuers. Also note that this is only an estimate.