Method of communicating and transmitting a message relating to a transaction of a contactless application, associated terminal, secure module and system

A mobile terminal including a processing unit, a contactless communications module, a secure module, and a man-machine interface,

• the mobile terminal configured to:
• enter a magnetic field emitted by an equipment;
• the contactless communications module configured to
• receive a selection message containing an identifier of a contactless application from the equipment;
• forward the message to the secure module;
• detect the end of a transaction;
• upon detecting the end of a transaction between the terminal and the equipment, send end of transaction detection information to the processing unit;
• the processing unit configured to, upon reception of the end of transaction detection information, send execution information to the secure-module, said execution information enabling execution of a program on the secure module, said program being specific to said contactless application;
• the secure module configured to, upon reception of the execution information,
• execute said program to insert information identifying said contactless application and end of transaction information into a message;
• transmit said message and a man-machine interface command to the processing unit;
• and
• the processing unit further configured to communicate said message on the man-machine interface in accordance with the man-machine interface command.

A system comprising a mobile terminal including a processing unit, a contactless communications module, a secure module, and a man-machine interface, the mobile terminal configured to:

• enter a magnetic field emitted by an equipment;
• the contactless module being configured to:
• receive a selection message containing an identifier of a contactless application from the equipment;
• forward the selection message to the secure module;
• upon detecting the end of a transaction between the terminal and the equipment, send end of transaction detection information to the processing unit;
• the processing unit being configured to, upon reception of the end of transaction detection information, send execution information to the secure-module, said execution information enabling execution of a program on the secure module, said program being specific to said contactless application;
• the secure module being configured to:
• upon reception of the selection message, launch said contactless application;
• upon reception of the end of transaction detection information, identify the contactless application associated with the transaction;
• execute said program specific to said contactless application;
• determine by said program a message containing information identifying said application and end of transaction information;
• and
• transmit said message and a man-machine interface command to the processing unit,
• said secure module being inserted in said terminal,
• the processing unit being further configured to communicate said message on the man-machine interface in accordance with the man-machine interface command.