Key for 3DES

Hi all
i'm new to java card.
i need to port a design using old secure chip that does not have a OS to a new chip that run JTOP.
After Java card receives the APDU command, the data need to be decrypted using 3DES.
How should i store these key during the card INITIALIZED phase?
should i use PUT_DATA or STORE DATA command?
Any advise?
Thanks.

shng wrote:
i need to port a design using old secure chip that does not have a OS to a new chip that run JTOP.
After Java card receives the APDU command, the data need to be decrypted using 3DES.
How should i store these key during the card INITIALIZED phase?
should i use PUT_DATA or STORE DATA command?You're probably talking about GlobalPlatform functionality. First advice is at least to look into the GP 2.1.1 card specification to get an overview. Then you should contact Trusted Labs to get a datasheet for the card you have.
Acc. to GP 2.1.1, PUT KEY and STORE DATA commands can be used to store security domain keys. PUT DATA command was supported in OP 2.0.1'.

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