A. The Defendant is a telecommunications business operator under the Telecommunications Business Act and a provider of information and communications services under the former Act on Promotion of Information and Communications Network Utilization and Information Protection, Etc. (amended by Act No. 11690, Mar. 23, 2013; hereinafter “Information and Communications Network Act”). The Plaintiffs are those who are currently using information and communications services provided by the Defendant upon entering into a contract to use information and communications services with the Defendant, or upon entering

B. The summary of the Defendant’s B system is as follows: (a) when the Defendant entered into a contract for the use of information and communications services with the Defendant’s user, the user provides the Defendant with information, such as name, resident registration number, address, etc.; and (b) during the use of the service, information, such as telephone numbers, details of the use of the service, imposition of charges, etc. In order to register, manage, and settle the user’s use of customer information as above, the Defendant planned the B system, which is a computer operating system, around March 2007; and (b) around February 2008, the development took place and completed the above system at the end of 2009; (c) the organization of B system is as follows: UI (UI) UI (UI) (UI (OI) (OI (OI) (OI (OI) by the Defendant’s employee or the Defendant’s agent, for the purpose of temporary or permanent access between people and things, systems, especially computer programs, etc.

Human 'Clar's 'Alcle' can be divided into ‘A' and ‘A' 'A' 'A' 'A' 'A' 'A' 'A.

The server composition is a server that leads the portal server, the AUT server, the ESB ESB (Eterrisece Bus, the mobile service bus): a server that performs a role as a broker for linking various services, application cases, data, etc.