Biometrics is a highly reliable technology where it has become possible to use the characteristics of a person or user (biometrics) along with traditional passwords, and we can even say that it has become an indispensable complement in modern authentication systems today, especially with regard to bank accounts, banks, financial technology (FinTech) internet of things (IoT) devices and all a process related to money and privacy, and biometric methods are multiple and increasing day by day, the most famous of which is (iris, face chart, palm, fingerprint, and others). Biometric systems are immune and immune from modern electronic attacks, such as plagiarism or electronic theft, because the authentication here takes place when all conditions are met. Then the authentication is done and the process is completed, and the aim is to reach the highest levels of accuracy and security and to make the user more comfortable to deal with these modern systems that provide him with many advantages and high privacy.

<span lang="EN-US">Smartphone has become more widely used than ever and become necessary to develop electronic payment systems using the internet of things (IoT) techniques with the smartphone. Payment solution is one of the most important issues in the IoT. It is the future to make life easier and better through the new relationships will be commercial, requiring payment for services and products. This paper develops a prototype of a payment system consisting of a network from several interconnecting devices such as radio frequency identification (RFID) reader, RFID card tag, equipped with microprocessors NodeMCU, and corresponding software represented by an interactive website for making process of purchase, a database (MySQL) for store data of payments. Focusing on the side of protecting the payment system, a security model for a simplistic payment system based on the IoT is represented by using biometric authentication in the sensor of smartphones like fingerprint authentication and face detection to make sure the identification of the user before making the payment process in the system.</span>