Method for performing electronic payments between a mobile equipment and a payment terminal over a short distance wireless interface, comprising displaying an identification (for example T; T-id) on the display (110) of said payment terminal (11), manually entering said identification on the input means (103) of said mobile equipment, using said identification in an message to the payment terminal, said message used to start establishment of an extended mutual authentication, said extended mutual authentication establishing a shared secret key for encrypting confidential payment information exchanged between the terminal and the mobile.