System comprising a remote transaction verification server, a portable electronic device and a secure electronic entity comprising a communication interface, the secure electronic entity being a secure electronic entity of the portable electronic device that consists of a SIM card or an embedded secure module (eSE), the portable electronic device and the remote server having means for connecting to a telecommunication network, the secure electronic entity comprising an application that, when the secure electronic entity is connected by said communication interface to the portable electronic device, comprises: - means for authenticating itself to said remote server, - means for receiving, from a payment application of said portable electronic device and via said communication interface, data relating to an envisaged transaction with a third-party device, the communication between the payment application and the application of the secure entity being protected using a secure access mechanism of access control type, and - means for transmitting said data via a secure connection to the remote server, in order for it to analyse them with the aim of taking a decision regarding possible authorization of the transaction, the system being characterized in that the application of the secure electronic entity moreover comprises: - means for authenticating said remote transaction verification server, and - means for setting up said secure connection, via the telecommunication network, between said application of the secure electronic entity and said remote server, using APDU commands and acknowledgements exchanged between the secure electronic entity and the portable electronic device in order to activate the BIP system, and in that the portable electronic device also comprises means for setting up said secure connection using UDP or TCP/IP commands transmitted to said remote server. the secure electronic entity being a secure electronic entity of the portable electronic device that consists of a SIM card or an embedded secure module (eSE), the portable electronic device and the remote server having means for connecting to a telecommunication network, the secure electronic entity comprising an application that, when the secure electronic entity is connected by said communication interface to the portable electronic device, comprises: - means for authenticating itself to said remote server, - means for receiving, from a payment application of said portable electronic device and via said communication interface, data relating to an envisaged transaction with a third-party device, the communication between the payment application and the application of the secure entity being protected using a secure access mechanism of access control type, and - means for transmitting said data via a secure connection to the remote server, in order for it to analyse them with the aim of taking a decision regarding possible authorization of the transaction, - means for authenticating itself to said remote server, - means for receiving, from a payment application of said portable electronic device and via said communication interface, data relating to an envisaged transaction with a third-party device, the communication between the payment application and the application of the secure entity being protected using a secure access mechanism of access control type, and - means for transmitting said data via a secure connection to the remote server, in order for it to analyse them with the aim of taking a decision regarding possible authorization of the transaction, the system being characterized in that the application of the secure electronic entity moreover comprises: - means for authenticating said remote transaction verification server, and - means for setting up said secure connection, via the telecommunication network, between said application of the secure electronic entity and said remote server, using APDU commands and acknowledgements exchanged between the secure electronic entity and the portable electronic device in order to activate the BIP system, - means for authenticating said remote transaction verification server, and - means for setting up said secure connection, via the telecommunication network, between said application of the secure electronic entity and said remote server, using APDU commands and acknowledgements exchanged between the secure electronic entity and the portable electronic device in order to activate the BIP system, and in that the portable electronic device also comprises means for setting up said secure connection using UDP or TCP/IP commands transmitted to said remote server.