High Security Keypad System

#include <LiquidCrystal.h>   // Include LiquidCrystal library
#include <Keypad.h>    // Include Keypad library
LiquidCrystal movie(A5,A4,A3,A2,A1,A0);
#define Password_Length 8     // Length of password + 1 for null character
char Data[Password_Length];     // Character to hold password input
char Master[Password_Length] = "12A34B5";   // Password
char customKey;  // Character to hold key input
int electric_motor = 10;   // Pin connected to Electric Motor
int buzzer = 11;   // Pin connected to Buzzer
int indicator_led = 12;   // Pin connected to Green Indicator LED
int k ;
int i = 0;
int s = 0;
int g = 0;
int a = 0;
int wait = 300; // Delay time for LED
byte data_count = 0; // Counter for character entries
const byte ROWS = 4; // Constants for row sizes
const byte COLS = 4; // Constants for column sizes

char hexaKeys[ROWS][COLS] = {  // Array to represent keys on keypad
{'1', '2', '3', 'A'},
{'4', '5', '6', 'B'},
{'7', '8', '9', 'C'},
{'*', '0', '#', 'D'}
};

byte rowPins[ROWS] = {9, 8, 7, 6};  // Connections to Arduino
byte colPins[COLS] = {5, 4, 3, 2};
Keypad customKeypad = Keypad(makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS); // Create keypad object

void setup() {

  pinMode(electric_motor, OUTPUT);  // Set Electric Motor pin as an OUTPUT pin
  pinMode(buzzer, OUTPUT); // Set Buzzer pin as an OUTPUT pin
  pinMode(indicator_led, OUTPUT); // Set Green Indicator LED pin as an OUTPUT pin
  Serial.begin(9600);    // Initialize serial communications at 9600 baud rate
  movie.begin(16,2);  // Initialize LiquidCrystal display
  Serial.print("Enter Password:");
  movie.print("Enter Password:");
  delay(1500);
  movie.clear();

}
void loop() {


for(k=0;k<7 && g<1;k++)          // "For loop" for taking Input 
{
  movie.setCursor(0,0);
 movie.print("Enter Password:");
 delay(100);

 customKey = customKeypad.getKey();  // Look for keypress
if (customKey) {                    // Enter keypress into array and increment counter
 Data[data_count] = customKey;
   Serial.print(Data[data_count]);
   
   movie.setCursor(s,1);           // LCD Command for changing the column of second row
   movie.print(Data[data_count]);
  
   digitalWrite(indicator_led,HIGH);  // Blink the green indicator LED with every successful input
   delay(wait);
   digitalWrite(indicator_led,LOW);
   delay(wait);

   data_count++;
   s++;
}
}


if (data_count == Password_Length - 1) {   // See if we have reached the password length
 while(i<1)                                
{
 Serial.println("");                      // For sending the serial monitor's cursor in next line
 movie.print("");
 i++;
}

 if (!strcmp(Data, Master)) {     // Password is correct
  
   digitalWrite(electric_motor, HIGH);
   digitalWrite(buzzer, LOW);
   Serial.println("correct");
   movie.clear();
   movie.setCursor(0,0);
   movie.print("The password is");
   movie.setCursor(0,1);
   movie.print("correct");
   delay(1000);
   movie.clear();
   g=1;
}
else {

   digitalWrite(electric_motor, LOW);     // Password is incorrect
   digitalWrite(buzzer,HIGH);
   Serial.println("incorrect");
   movie.clear();
   movie.setCursor(0,0);
   movie.print("The password is");
   movie.setCursor(0,1);
   movie.print("incorrect");
   delay(1000);
   movie.clear();
   g=1;
}
}
   a=1;
}
void clearData() {            
while (data_count != 0) {     // Go through array and clear data
Data[data_count--] = 0;
}
return;
}