Method for carrying out a transaction between an apparatus and a mobile phone

A method for selling transportation titles using an electromechanical automaton able to punch a transportation title and a mobile telephone comprising a first memory for storing an identifier, the identifier being able to identify the mobile telephone uniquely, the method comprising:

• a) receiving the identifier via radiofrequency communication by the electromechanical automaton able to punch a transportation title,
• b) storing the identifier in a memory of the electromechanical automaton,
• c) identifying the mobile telephone by the electromechanical automaton able to punch a transportation title from the received identifier,
• d) generating, by the electromechanical automaton able to punch a transportation title, a transportation title in the memory of the electromechanical automaton,
• e) computing a signature in the memory of the electromechanical automaton, and
• f) inserting the signature in the transportation title, the signature being able to authenticate the transportation title,
• wherein the method is carried out by an embedded controller;
• and
• wherein the electromechanical automaton is able to punch a physical transportation title.