8-2. The term "illegal wiretapping equipment detection" means detecting an equipment used for wiretapping or listening to conversations conducted except as provided in this Act; 9. The term "e-mail" means the transmission of any message or any message transmitted through the computer network; 10. The term "membership information service" means the information service provided to any specific member or contractor, or the network of such information service; 11. The term "communication confirmation data" means any of the following data on the records of telecommunications: (a) The date of telecommunications by subscribers; (b) The time that the telecommunications commence and end; (c) The communications number of outgoing and incoming call, etc. and the subscriber number of the other party; (d) The frequency of use; (e) The computer communications or Internet log records relating to facts that the users of computer communications or the Internet have used the telecommunications services; (f) The data on tracing a location of information communications apparatus connecting to the information communications networks; (g) The data on tracing a location of connectors capable of confirming the location of information communications apparatus to be used by the users of computer communications or the Internet for connecting with the information communications networks; 12. The term "electronic serial number" means an electronic unique identification number given to a mobile phone for which a contract for utilization has been concluded with a mobile communications business entity. Article 3 (Protection of Secrets of Communications and Conversation) (1) No person shall censor any mail, wiretap any telecommunications, provide communication confirmation data, or record or listen to any conversation between others that is not made public, except as provided for in this Act, the Criminal Procedure Act or the Military Court Act: Provided, That the following cases shall be governed by the relevant statutes: <Amended on Dec. 29, 2000; Dec. 29, 2001; Jan. 29, 2004; Mar. 31, 2005; Dec. 21, 2007; Nov. 2, 2009> 1. Handling of returned mail, etc.: Where parcel postal items (including any mail similar thereto) suspected of containing such contraband items as explosives are opened, where the mail cannot be delivered to the addressee or is returned to the sender because of the addressee's refusal to accept it, where the mail is opened in order to identify the address and name of the sender of the mail that the addressee refuses to receive because of missing address and name of the sender, or where any unreturnable mail containing valuables is handled, in accordance with Articles 28, 32, 35 and 36 of the Postal Service Act;