Based on the output, how to change the float number (temperature and humidity) to byte to run this AES coding. thanks

Message (Enter to send message to 'Arduino Uno' on 'COM3') Serial.println("Failed to read DHT11"); \} else Serial.println(); Serial.print("Temperature : "); Serial.print(temperature); Serial.println(); Serial.print("Humidity : "); Serial.print(humidity); // delay(9600); \} aes128.setKey(key, 16);// Setting Key for AES Serial.println(); Serial.println(); Serial.print("Before Encryption:"); for(int i=0; i30.30 Humidity : 67.00 Before Encryption: 0112233445566778899 A.ABBCCDDEEFF After Encryption: 69C4EOD8 6A7B430D8CDB78070B4C55A After Dencryption: 0112233445566778899 AABBBCCDDEEFF