Initializing your ACOSJ-G Java Card involves a few key steps. First, upon its initial power-up, the card begins in a pre-personalization state. The initial command you'll execute is the INIT_CARD command. This crucial step sets up the card's memory with default settings. Following initialization, you can access the ACOSJ ROOT Application, identified by the AID: Transport Key. This application allows you to configure various card parameters. You'll interact with the ROOT application using the SELECT command to access its features. Within the ROOT Application, you'll utilize commands such as READ, WRITE, and ACTIVE. The READ command enables you to view the current configuration parameters. The WRITE command lets you modify these parameters, and finally, the ACTIVE command is used to activate the card. Once you've configured the card to your specifications, you can exit the ROOT Application, typically by resetting the card. After successfully activating the card with the ACTIVE command, the ROOT Application becomes inactive, preventing further direct configuration changes. For added verification, you can also employ the ACOSJ IDENTIFY Application, which is identified by the AID: 6163732E636F732E61636F736A766572. This application allows you to retrieve the ACOSJ version and check the activation status of your card. Always consult the official ACOSJ-G Java Card User Manual for the most detailed command references and specific parameter information.
