1. 1. Al-Assam, Sellahewa and Jassim, “On Security of Multi-Factor Biometric Authentication”, IEEE 5th International Conference for Internet Technology and Secured Transactions, London, UK, 2010.
   2. Shinde Swapnil K, Patil Yogesh N and Godase Avinash P, “Secure Web Authentication by Multifactor Password a New Approach”, International Journal of Software and Web Sciences, ISSN (Online): 2279-0071, pp. 58-62, 2013.
   3. Wikipedia“Two-factorAuthentication”,[online]. Available:http://en.wikipedia.org/wiki/Two_factor_authent ication
   4. Wikipedia, “Multi-factor authentication”, [Online].Avilable:http://en.wikipedia.org/wiki/Multifactor_authentication.
   5. Mashape, “Face Recognition API”, [Online]. Available: https://www.mashape.com/lambda/face-recognition
   6. Monteiro, Rodrigues, Lloret, “A Secure NFC Application for Credit Transfer Among Mobile Phones”, IEEE 978-1-4673-1550-0/12, 2012
   7. Mopius, “HTML5 Loves NFC”, [Online]. Available:http://www.mopius.com/html5-loves-nfc/.
   8. Profis S, “Near Field Communication”, [Online].Available:http://www.cnet.com/how-to/how-nfcworks-and-mobile-payments/
   9. "Two factor Authentication". Available: http://www.mas.gov.sg/moneysense/understandingfinancial-products/investments/consumeralerts/understanding-two-factor-authentication-andtransaction-signing.aspx.
   10. ”Biometric-based multi-factor authentication”. Available:http://www.asd.gov.au/publications/csocprotect/ multi_factor_authentication.htm