摘要:
Smart card readers dedicated to a particular application use both a microcontroller whose read only memory determines the running of the application, and a security component executing, under the control of the microcontroller, subroutines related to the security of the application (authentication, confidential programs, etc.). So that the manager of the application can have access to certain memory areas of the security component, provision is made for the microcontroller to be able to pass automatically to a so-called “transparent” mode, when a specific access code issued by a test card is recognized. In this mode, the read or write instructions for a memory area, issued by the test card, are interpreted by the microcontroller as being read or write instructions for a memory area of the security component rather than the microcontroller.
摘要:
The method of loading applications programs into a memory card reader having a microprocessor, connected by telephone to a server center, and suitable for executing these applications is such that the applications programs are stored in the memories of cards entitled to said applications while corresponding application pointers are stored in the server center, with the method consisting, once a card has been inserted in the reader, in setting up a telephone call from the reader to the server, in transferring the pointer for the application requested by the reader over the telephone line, in the reader interpreting the pointer to find the corresponding application program in the card, and then in transferring the program very quickly to the reader for the purpose of executing it. The invention applies in particular to those applications programs which are run most frequently from a memory card.