Hello, I’m debugging NAN communications between the latest wpa_supplicant and an iOS device, and I’ve run into the exact same issue. I suspect the root cause is an incorrect MIC calculation for SDF SKDA. Relevant protocol specifications and corresponding implementation code within wpa_supplicant for this logic are incomplete. I’ve implemented the MIC computation following the NDP SKDA specification, yet the resulting MIC value never matches the one transmitted by the iOS device. Have you resolved this problem? If so, could you share the underlying cause?