In this paper, we introduce existing secure keypad methods and analyze its robustness. Also, we introduce recent attack types -social engineering attacks- and analyze robustness and usabilities of existing methods proposed by researches. Then, we propose a secure keyboard input method having improved robustness and usabilities. Proposed method uses QWERTY keyboard layout, borderless-circular motion capable keypad structure since the key array layout is fixed, and grid structure. Grid structure includes user pre-defined grid pointer. Then we explain how the structure information of the grid is applied as a pointer as pattern information. As a result of performance comparison, proposed method is robust against social engineering attacks such as shoulder surfing, recording, smudge, and password guessing compared with the existing methods. Also, the proposed method provides similar level of user convenience as the existing virtual security keyboard input methods..