Abstract: Disclosed are methods, computer devices, and a non-transitory computer-readable recording mediums to differentially limit a message transmission in a messaging-based social network service. A message transmission limiting method may include calculating a participation score according to an activity related to a user in a chatroom, setting a speech time limit for the user based on the participation score, and limiting a message transmission of the user through the chatroom according to the speech time limit.

Abstract: Disclosed is a method, system, and non-transitory computer-readable record medium for creating a chatroom according to a condition. The chatroom creation method may include providing an instant messaging service; registering a chatroom creation condition related to a specific account of the instant messaging service; retrieving at least one account of accounts of the instant messaging service that meets the chatroom creation condition; and automatically creating a chatroom of the specific account joined by the retrieved accounts.

Abstract: A method, a system, and a non-transitory computer readable record medium for expressing an emotion in a conversation message using a gesture are provided. A message expression method may include: receiving a message that is entered in a message input area of a chatroom; obtaining animation information based on an input applied to the message in the message input area; modifying the message based on the animation information; and displaying the modified message in a chat view area of the chatroom in response to receiving a message send request.

Abstract: Payment methods and systems for processing a payment using a Central Bank Digital Currency (CBDC) without a double payment in an offline situation (e.g., in a situation in which a terminal of a user is unable to be connected) to a server through a network may be provided.

Abstract: Disclosed are methods and apparatuses for processing a notification using a notification preset. A notification processing method may include providing, by the at least one processor, a notification preset setting function for setting a notification preset, the notification preset including a preset condition and a preset result, creating, by the at least one processor, at least one notification preset instance through the notification preset setting function, monitoring, by the at least one processor, whether a condition meets one of the at least one notification preset instance, and dynamically changing, by the at least one processor, a notification setting of the computer apparatus from a first state to a second state in response to a result of the monitoring indicating that the condition meets a first notification preset instance, from among the at least one notification preset instance.

Abstract: A file protection method of a computer apparatus including a processor, the method including extracting classes from an executable file of a package file, classifying the classes into class groups, adding a loading code to a first class group among the class groups, the loading code configured to cause sequential loading of the class groups to a memory in a random loading order in response to execution of the package file, adding an integrity code to a second class group among the class groups, the integrity code configured to verify an integrity of a corresponding class group among the class groups or a previous class group among the class groups, the previous class group including the loading code configured to cause the corresponding class group to load, and regenerating the package file using the class groups after the adding the loading code and the adding the integrity code.

Abstract: A method for generating virtual content is provided, which is performed by one or more processors, and includes receiving video content, extracting first motion data of a first object included in the video content, and converting the video content in accordance with a first virtual environment based on the extracted first motion data of the first object so as to generate virtual content in the first virtual environment.

Abstract: An operation method of a user terminal for participating in a group event through an instant messaging application includes receiving, by the user terminal, a group event invitation message including information about an event start time through the instant messaging application; receiving, by the user terminal, a response to the invitation message from a user of the user terminal; in response to the user accepting the invitation message, transmitting, by the user terminal, an acceptance message through the instant messaging application; and receiving, by the user terminal, a group event participation request through the instant messaging application at a time corresponding to the event start time.

Abstract: A secure message providing method may be performed by a system or apparatus for providing a secure message. The secure message providing method may secure content of a secure message by limiting the content of the secure message to be verified while a secure condition set by a first user side is being met by a second user side with respect to secure messages transmitted and received between users through a messaging service.

Abstract: A method for providing a graphic object based on a display mode, may include receiving the graphic object, displaying the graphic object on a display of the user terminal, detecting a change of the display mode of the user terminal from a first display mode to a second display mode, and in response to detecting the change of the display mode of the user terminal from the first display mode to the second display mode, changing a color of at least a portion of the graphic object.

Abstract: A method, apparatus, system, and non-transitory computer readable medium for controlling user access through content analysis of an application are disclosed. The method for controlling access may include understanding a public level according to honorific language use by analyzing chat contents for each chat partner registered in an application, by the at least one processor; and controlling user access to the application based on the public level for each chat partner, by the at least one processor.

Abstract: A content sharing method performed by a computer apparatus including processing circuitry, the method including providing, by the processing circuitry, an interface in response to a user input during a voice over Internet protocol (VoIP) call, a user of the computer apparatus participating in the VoIP call, generating, by the processing circuitry, metadata of a VoIP call packet in response to a share request for content specified through the interface, the metadata including data corresponding to the share request, sending, by the processing circuitry, the metadata to another user participating in the VoIP call, and displaying, by the processing circuitry, a playback screen of the content with a call screen of the VoIP call, the content being shared during the VoIP call between the computer apparatus and another computer apparatus of the other user using the metadata.

Abstract: A method, a computer device, and a non-transitory computer-readable recording medium are provided to select and display a message in a messaging-based social network service. A message selection and display method includes displaying, in a chatroom, main messages selected from among unread messages in the chatroom at a time of entry into the chatroom; and displaying, in the chatroom, at least one additional message among previous unread messages and subsequent unread messages of a specific message based on the specific message selected from among the main messages.

Abstract: A method, system, and non-transitory computer-readable record medium for providing a reward through a reward account connected to a player. A reward providing method includes connecting, by processing circuitry, a plurality of reward accounts registered by a user on a player, the player being installed on an electronic device, determining, by the processing circuitry, an analysis result based on content playback information, the content playback information corresponding to content output through the player, and providing, by the processing circuitry, a reward through a first reward account among the plurality of reward accounts based on the analysis result, the reward corresponding to the content output through the player.

Abstract: A method, a device, and a non-transitory computer-readable recording medium are provided for creating a chatbot scenario in consideration of a response rate. A chatbot scenario creation method may include obtaining chatbot sentence components and at least one chatbot sentence including the chatbot sentence components from a chatbot; predicting a response rate of a user for at least one chatbot sentence based on a predicted response rate preset for each of chatbot sentence components; and providing the predicted response rate of the user for the at least one chatbot sentence.

Abstract: Disclosed is a method, apparatus, and non-transitory computer-readable record medium for providing additional information on content. An additional information providing method includes recognizing, by processing circuitry, a plurality of persons in a frame of a video during playback of the video, determining, by the processing circuitry, a user likeability of the plurality of persons, recognizing, by the processing circuitry, an object associated with a specific person among the plurality of persons based on the user likeability, the object being in the frame, and generating, by the processing circuitry, a screen containing additional information corresponding to the object.

Abstract: Methods, systems, and non-transitory computer-readable record media for managing event messages may be provided. A message management method may include generating, by at least one processor, an event related to a chatroom based on an event message input from the chatroom, assigning, by the at least one processor, a reply to the event message, from among messages in the chatroom, to the event, and displaying, by the at least one processor, the reply to the event message in association with the event.

Abstract: A method, a system, and a non-transitory computer-readable record medium are provided to display content of interest. A content display method may include analyzing a user interest based on a user activity on an application; generating a customized content in response to receiving from a server, information that matches the user interest; and displaying the customized content through an interface related to a specific event when the specific event occurs on the application.

Abstract: A noise cancellation method including generating a first voice signal by canceling a first portion of noise included in an input voice signal using a first network, the first network being a trained u-net structure, and the first portion of the noise being in a time domain, applying a first window to the first voice signal, performing a fast Fourier transform on the first windowed voice signal to acquire a magnitude signal and a phase signal, acquiring a mask using a second network based on the magnitude signal, the second network being another trained u-net structure, applying the mask to the magnitude signal, generating a second voice signal by canceling a second portion of the noise by performing an inverse fast Fourier transform on the first windowed voice signal based on the masked magnitude signal and the phase signal, and applying a second window to the second voice signal.

Abstract: A method, apparatus, system, and non-transitory computer readable medium for controlling user access through content analysis of an application are disclosed. The method for controlling access may include understanding a public level according to honorific language use by analyzing chat contents for each chat partner registered in an application, by the at least one processor; and controlling user access to the application based on the public level for each chat partner, by the at least one processor.