JavaCard OS

Hello!

I want to make the applet be the locked state on card power transitions. I mean once the card loses power, the applet should be locked the next time it is powered. I have already looked at MultiSelectable and AppletEvent, but they all seem to trigger only when the applet is selected or deselected.

Anyone has the similar work experience before?

As code can't be called after power is lost.

The simple method is to keep a magic in CLEAR_ON_RESET memory and always check for the presence of the magic cookie in either select() or process() and run your code if not.

If I use a magic with CLEAR_ON_RESET, won't this also be reset for an ATR?

Yes, it would also respond to a warm reset.