Abstract: A method for data transmission between a sensor module for measuring and storing data and a mobile device wherein the sensor module and the mobile device have identified each other and, wherein the sensor module comprises a first secure element capable of storing a first security key and the mobile device comprises a second secure element capable of storing a second security key characterized in that the method comprises the steps of an authentication step for carrying out a security process between the sensor module and the mobile device in order to authenticate the sensor module with the mobile device by means of comparing first and second security keys; a pairing step for establishing a communication between the sensor module and the mobile device in order to enable communication therebetween; a transmission step for establishing a secure transmission of data from the sensor module to the mobile device when comparison of the first and second security keys has resulted in authentication.