Below is part of AES GCM diagram. However, it only shows the behavior of the IV/counter.
The GCM specification examples state both an IV and a Secret Key as two inputs.
Can someone please explain where both are used?
Is the 96 bit IV expanded to 128 bits, incremented (most-significant byte?) and used to create the AES Key Expansion?
And the Secret Key is passed (with the Key Expansion) to
E_k for encryption?