A method of conducting secure electronic payments to a payment acquirer using a credit card payment unit, comprising of a smart card, a portable card reader device, a mobile phone, a stand-alone PIN entry device and a payment server. The method is based on eliminating the unsecure keyboard in a mobile phone used for entering personal identification information, and instead use a separate secure PIN entry device which fulfills the EMV Level specification. Since all sensitive payment information, communicated to the payment server from the card reader and the PIN entry device, is encrypted using unique encryption keys an unsecure mobile phone may be used for relaying the communication between the card reader device and the PIN entry device to and from the payment server.