In this paper consider the biometric is a very safe and common device, with the help of which, one can easily identify the attacker and the authorized person. The online examinations conducted by government or private agency, any field of industry and data, document file can also be shielded from any attacker by using this device. The use of the Internet of Think (IoT) as a biometric device is to ensure its identity. In the present paper, the authors have implemented various types of protocols to overcome this difficulty. However, the use of RFID can also be manipulated by any person so that the biometric devices be proved the best option.