Abstract: Disclosed herein are a method for providing active security authentication, and a terminal and system for supporting the same. The terminal includes a storage unit, a display unit, an input unit and a control unit. The control unit arranges a plurality of keys through an arrangement of random numbers when a security execution condition is satisfied, outputs, to the display unit, a security authentication screen based on a random-number matrix in which at least some keys in key regions adjacent to an item key among the plurality of keys arranged by the arrangement of the random numbers are set to exception keys that a user must not press, and decide that the terminal is used for an illegal use when the exception keys are included in an input information generated through the input unit.

Abstract: Disclosed herein are a method for providing active security authentication, and a terminal and system for supporting the same. The terminal includes a storage unit, a display unit, an input unit and a control unit. The control unit arranges a plurality of keys through an arrangement of random numbers when a security execution condition is satisfied, outputs, to the display unit, a security authentication screen based on a random-number matrix in which at least some keys in key regions adjacent to an item key among the plurality of keys arranged by the arrangement of the random numbers are set to exception keys that a user must not press, and decide that the terminal is used for an illegal use when the exception keys are included in an input information generated through the input unit.