A. The Defendant is a telecommunications business operator under the Telecommunications Business Act, and is 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 currently use information and communications services provided by the Defendant by entering into a contract for the use of information and communications services with the Defendant

B. A summary of the Defendant’s N-SETP system (1) when the Defendant entered into an information and communications service contract with the Defendant, the user provides the Defendant with information, such as name, resident registration number, address, etc., and the user provides information while using the service. The Defendant plans N-SETP system, which is a radio computer system, around March 2007, in order to register and manage the above customer information and impose fees by settling the user’s details of the use of the service. Around February 2008, the Defendant completed the N-SETP system at the end of 2009. (2) The organization of the N-SPEP system is considerably significant: ① the Defendant’s employee or the Defendant’s agent’s agent’s N-SPE UI (UI) U.S. U.S. (O.O. access to the information and communications system, especially the user or user’s temporary access to the computer system and the user’s physical access to the computer system or the user’s body.

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In the server composition, the server server, AUT server, ESB, ESB (Eterpcece Bus, Co., Ltd.) plays a role as a broker that connects various services, events, data, etc.