GID Key

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The GID-key (device group ID key) is the AES 256-bit key shared by all devices with the same application processor. This key differs between each SoC. (i.e. The S5L8900 has a different key from the S5L8930.)

It was used to generate Key 0x837.

Attack

It would be great to perform some sort of side channel attack on this to extract it:

See also