PORTABLE DATA CARRIER AND SYSTEM COMPRISING AN END DEVICE AND A PORTABLE DATA CARRIER

摘要

The invention relates to a security module (1) comprising a first interface (2) and a second interface (4) and which is used to receive and evaluate first data via the first interface (4). According to the evaluation result, a ready-to-receive phase for receiving the data via the second interface (2) is carried out or not carried out. A reply (22; 21; 18) of the security module to the received data (17; 23; 24) is initially sent by the first interface (4) after the ready-to-receive phase has been initiated for the second interface.