JavaCard OS

In GlobalPlatform - Card Specification Version 2.1.1, the Authentication part is shown with OPTIONAL Authentication in Load and Installation flow diagram!



I wonder whether it is possible to load and install applet on card without any authentication. Or if I misunderstood this, please correct me.

Thanks

You can see this table in part 9. APDU Command Reference.



This figure shows that Both load and install require a secure channel. The diagram you mention may not require an explicit authentication as implicit authentication could also be used.

Thanks for your help, bro.
But what's explicit authentication? what's implicit authentication? Could you tell me more?