Defendant C, D, E, E, F, G, H, I, J, K, K, L, M, jointly with the Plaintiff B, C, D, E, F, G, H, I, K, K.

A. 1) The status of the party, etc. 1) Defendant’s national card, lot card, and NongHyup Bank is a stock company that operates businesses such as the issuance, sale, and management of credit cards, pre-paid cards, pre-paid cards, and NongHyup Bank (hereinafter “Defendant’s credit card companies”).

Defendant A is a corporation that is jointly invested and established by financial institutions and that is engaged in business such as credit inquiry and credit investigation as prescribed by the Use and Protection of Credit Information Act. 2) The Plaintiffs are those who used or used credit cards, etc. upon entering into a contract for the use and financial transaction with Defendant National Card, lot Card, and Nong Bank. 1 through 3 companies and credit cards.

B. The concept of the card accident analysis system and the introduction card accident analysis system (hereinafter “FDS”) are introduced by all domestic credit card companies as a system to detect abnormal or fraudulent use due to theft, loss, forgery, etc. of credit cards. According to FDS, an analysis model is made based on statistical methods using large-scale card use information and pertinent customer information based on past accident transactions and based on this, if it is discovered that abnormal types of transactions have occurred according to the statistical analysis pattern of the credit card when using the credit card.

C. Defendant’s national card leakage 1) conclusion of the FDS development service contract and provision of credit card customer information (A) Defendant’s national card concluded a contract with Defendant A on January 30, 2013 with a contract amounting to KRW 227,419,50, and KRW 7 months from the delivery deadline date.

B. The development human resources of Defendant A, including S, the general manager of the project, and the development human resources of Defendant A on February 2013.