Portable device for multi-application authentication

摘要

The data exchange method involves making a mobile device (3) select the application (Z1-Z3) of the device that corresponds to a reader in response to the authentication command sent by the reader. The mobile device is also configured to address the selected application block in response to the read and write command also sent by the reader. The authentication command allows the mobile device to authorize a transaction for at least part of an application supported by the mobile device. The read and write command is used to read and write a definite data block.