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Z-Stack Home Automation Security detail

Other Parts Discussed in Thread: Z-STACK

Hi everybody,

I am starting to work with the CC2530 (Z-Stack 2.2.1) and the Home Automation Examples. I had some unclear points.

I read the Z-Stack Developer's Guide - Chapter 10 and got some concept about security of Z-Stack. I knew that Trust Center Link key (TCLK) is used to encrypt the network key (during the Transport key process), I wonder that what is the role of the Network key, which kind of data will be protected by Network key.

Thank you,

Best Regards.