Study to Improve Security for IoT Smart Device Controller: Drawbacks and Countermeasures

Table 3

Comparison table of proposed schemes.

Category	Proposed	Advantages	Disadvantages
Text password	Circular keypad with grid mesh pointer	Display no password on screen; Very hard to estimate or trace	Low input speed; Remember longer password information
	Floating keypad with stick pointers	Display no password on screen; Hard to estimate or trace	Low input speed; Remember longer password information
Graphical password	Layered pattern	Hard to estimate or trace	Low drawing speed; Remember more information about layers; Need more functions for moving between the layers
	Pattern with 3D touch	Very hard to estimate or trace; Higher speed compared to layered pattern	Remember more information about section pressures; Need 3D sensor-embedded device
PIN	Image array and circular PIN combination	Randomly repositioned PIN code; Hard to estimate or trace	Low input speed; Remember more information about password/image combination
Signature	Sensor-based 3D signature	High speed; No need for optional device	Need higher algorithmic sensible detection process
Fingerprint	Fingerprint with heart-rate detection	Robust to fake attack; No need for optional device	Depending on mobile device structure