A question about the license of rtems

[PowerMan]

hello,
    I am developing a security production using rtems.
because of the GPL license of rtmes, I should share the
source code.
    but the production is designed to solve security problem.
Opening the source would make the production useless.
Bad people could crack our system easily.

    So, I make rtems to a library, my key code to another lib.
Then I link them together to produce the final execution.

Need I open the key code?

Thanks.
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