Abstract: An apparatus and method are provided, which determine whether the abnormal account performs an abnormal trade with at least one account, assign an abnormality score to the abnormal account according to whether the abnormal account performs the abnormal trade, and control the abnormal account with a control level corresponding to a predetermined reference score when the abnormality score assigned to the abnormal account is higher than or equal to the predetermined reference score.

Abstract: The present invention relates to an apparatus and method for inputting a password using a game. The method includes displaying, on a display unit, a password image corresponding to at least one password information, displaying, on the display unit, at least one obstacle image, displaying, on the display unit, a character image moved based on movement information received from an external input unit, determining whether the character image is in contact with the password image, and controlling a user authentication procedure to be performed based on the at least one password information corresponding to the password image when the character image is in contact with the password image.

Abstract: The present invention provides a method for information recovery using a snapshot database, comprising the steps of: collecting first user log information for users of one or more user terminals; sorting effective information from the first user log information; storing the sorted effective information into the format of a snapshot database in accordance with period information; receiving recovery request information for the effective information from the user terminals; comparing and analyzing the second user log information and the effective information at the point of time where said recovery request information is received in accordance with said recovery request information; and recovering the second user log information to said effective information in accordance with the result of the analysis.

Abstract: The present invention relates to an apparatus and method for inputting a password using a game. The method includes displaying, on a display unit, a password image corresponding to at least one password information, displaying, on the display unit, at least one obstacle image, displaying, on the display unit, a character image moved based on movement information received from an external input unit, determining whether the character image is in contact with the password image, and controlling a user authentication procedure to be performed based on the at least one password information corresponding to the password image when the character image is in contact with the password image.