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How to get LTK

Henry_BLE
Associate II

Hello community, 
I am currently considering capturing and analyzing BLE packets by using BLE sniffer, but for that I need the LTK used for decryption.BLE Secure Connection pairing does not directly exchange LTK, so I do not know where to find it exactly in BLE Stack.

Could you please tell me how to output an LTK log by modifying the user source code?
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[Srouce]

STM32CubeWBA/Projects/NUCLEO-WBA55CG/Applications/BLE/BLE_SerialCom_Peripheral at main · STMicroelectronics/STM32CubeWBA

 

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