NRF sniffer Encrypted packet decrypted incorrectly (bad MIC)

[Udhayakumar Mahendiran]

Hi,

I am using PCA10028 development kit for sniffer with wireshark 3.0.1 using sniffer version V2.0 beta 3 . I am getting issue like "Encrypted packet decrypted incorrectly (bad MIC)" when listen to a secured connection.

I am sniffing from the beginning before the bonding process and after bonding process. But I am not able to get any data packets. I have also managed to get LTK passkey from slave device and entered in the passkey field in wireshark, then also same errors coming up. I have gone through all forum questions related to this but nothing help. Kindly help this out guys. 

[David Edwin]

Hi,

You should see advertising packets arriving and the link getting established, is that happening ?
The nRF Sniffer v2 beta 3 does not have the capability to take the LTK, you need provide only the Passkey(if used).

Post the pcap file if you need more help.

Thanks
David
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Note:
Are you using LE Secure connections ? That is not supported in the nRF Sniffer v2 beta 3 release. 

[Udhayakumar Mahendiran]

Hi David,

Sorry for delayed response, had been busy with other work. Yes I am able to see advertising packets , Connection request, responses and then pairing occurs. after that I am getting that error "Encrypted packet decrypted incorrectly (bad MIC)".  I assume it is not LE secure connections, because the client which is initiating connection here is BLE 4.0. 

All I need is to sniff encypted packet. Sniffer is always "ON" while connection, pairing, data transfer, and reconnection.

How can I insert pcap file in private?.