Algorithm 2. Authentication Phase of FBAT

1: Draw a GUI in function 2:   Initialize Ю 3:   Initialize ς 4:      Select triangle {L1} 5:      Pattern saved ϸ 6:      L1++ 7:       Select triangle {L2} 8:       Pattern saved ϸ 9:       L2++ 10:        Triangle selection {L3} 11:        Data saved ϸ 12:   if 13:       Pattern value = = saved value 14:       Unlock 15:   Else 16:       Error message 17:       Retry 18:       ς ++ 19:   if 20:       ς ++ ≥ 5 21:       Timer set == 30 s 22:   endif