Abstract: A method and a system for providing message based-notification, and a method for providing message based-notification comprises: setting, as a primary notification object, a main object associated with a user of an electronic device among notification objects on a messenger installed in the electronic device; detecting the primary notification object by using a message transmitted or received through a conversation session set between an account of the user of the electronic device and an account of another user; and when the primary notification object is detected, controlling a server to generate a notification message for the corresponding notification object and transmit the notification message to the account of the user of the electronic device.

Abstract: Provided is a system and method for authenticating a user using history of the user. One or more example embodiments provide a system and method that enables a server to perform an authentication or an additional authentication of a user based on use history of the user associated with a service when the server provides the service to an electronic device over a network.

Abstract: A method and a system for providing message based-notification, and a method for providing message based-notification comprises: setting, as a primary notification object, a main object associated with a user of an electronic device among notification objects on a messenger installed in the electronic device; detecting the primary notification object by using a message transmitted or received through a conversation session set between an account of the user of the electronic device and an account of another user; and when the primary notification object is detected, controlling a server to generate a notification message for the corresponding notification object and transmit the notification message to the account of the user of the electronic device.

Abstract: Provided is a system and method for authenticating a user using history of the user. One or more example embodiments provide a system and method that enables a server to perform an authentication or an additional authentication of a user based on use history of the user associated with a service when the server provides the service to an electronic device over a network.

Abstract: Provided is a system and method for authenticating a user using history of the user. One or more example embodiments provide a system and method that enables a server to perform an authentication or an additional authentication of a user based on use history of the user associated with a service when the server provides the service to an electronic device over a network.

Abstract: A user authentication system and method uses a contact list that may receive contact list information stored in an electronic device from the electronic device over a network. The system is further configured to store, in a database, and manage first contact list information received from a first electronic device of a user through the reception controller in association with an identifier of the user, compare second contact list information received from the first electronic device or a second electronic device to the first contact list information stored in the database in association with the identifier of the user, in response to a service request from the first electronic device or the second electronic device based on the identifier of the user; and determine whether to authenticate the user in response to the service request from the first electronic device or the second electronic device based on the comparison result.

Abstract: Provided is a system and method for authenticating a user using history of the user. One or more example embodiments provide a system and method that enables a server to perform an authentication or an additional authentication of a user based on use history of the user associated with a service when the server provides the service to an electronic device over a network.

Abstract: A user authentication system and method uses a contact list that may receive contact list information stored in an electronic device from the electronic device over a network. The system is further configured to store, in a database, and manage first contact list information received from a first electronic device of a user through the reception controller in association with an identifier of the user, compare second contact list information received from the first electronic device or a second electronic device to the first contact list information stored in the database in association with the identifier of the user, in response to a service request from the first electronic device or the second electronic device based on the identifier of the user; and determine whether to authenticate the user in response to the service request from the first electronic device or the second electronic device based on the comparison result.