Abstract: The present invention provides a client terminal for receiving a cloud computing service from a cloud server that provides the cloud computing service. The client terminal includes a character string information extractor configured to extract character string information from document data requested to print in a printer that is connected to the client terminal, a confidential information detector configured to detect confidential information from the extracted character string information and a controller configured to prohibit printing of the document data including the character string of the detected confidential information or to mask at least one or more characters of the character string of the detected confidential information, with predetermined specific characters.

Abstract: A cloud application system installed in a client terminal that is connected to a cloud server via a network, the cloud application system comprising: a first driver controlling module configured to display a list of folders of a relevant user in the cloud server by communicating with the cloud server; a second cloud driver controlling module configured to encrypt a file of the cloud server to store it as the encrypted security file when the file is stored in the client terminal.

Abstract: Provided is a method of securing a Universal Serial Bus (USB) keyboard. According to the method, a keyboard security operation is performed at a host controller driver level, which is one level lower than a USB hub driver level. Thus, it is possible to rapidly and effectively prevent a malicious program from leaking information input from a keyboard that is in communication with a main frame and transfers data via a USB.

Abstract: A keyboard security status check module and method are provided. The module is provided to enable a user to easily check the operating status of a keyboard security program installed in a user terminal. The module includes a keyboard security monitor linked to the keyboard security program and configured to monitor a reception status of key input data protected by keyboard security, and a controller configured to display a dynamic keyboard security check representation on a screen of the user terminal according to the reception status of the key input data monitored by the keyboard security monitor.

Abstract: Provided is a computer security apparatus and a method using a security input device driver. Data inputted through a data input unit is directly encrypted at the security input device driver without passing through an OS input device driver supporting in an OS. Thereby, the data inputted through the data input unit can be prevented from being illegally acquired by any hacking program from the beginning.

Abstract: Provided is a method of securing a Universal Serial Bus (USE) keyboard. According to the method, a keyboard security operation is performed at a host controller driver level, which is one level lower than a USE hub driver level. Thus, it is possible to rapidly and effectively prevent a malicious program from leaking information input from a keyboard that is in communication with a main frame and transfers data via a USB.