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Difference between revisions of "UID key"
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| − | The '''UID key''' (device's unique ID key) is an AES 256-bit hardware key, unique to each iPhone. It's fused into the application processor during manufacturing. It was previously used to encrypt things in the [[NOR]]. In later iOS versions, it is used to encrypt the entire file system, so that the flash chips cannot moved to another device and read out there again. On the [[S5L8960]] and later, the [[Secure Enclave|SEP]] has it's own UID in it's own AES Engine, and that UID is the one used to encrypt the filesystem on iOS |
+ | The '''UID key''' (device's unique ID key) is an AES 256-bit hardware key, unique to each iPhone. It's fused into the application processor during manufacturing. It was previously used to encrypt things in the [[NOR]]. In later iOS versions, it is used to encrypt the entire file system, so that the flash chips cannot moved to another device and read out there again. On the [[S5L8960]] and later, the [[Secure Enclave|SEP]] has it's own UID in it's own AES Engine, and that UID is the one used to encrypt the filesystem on iOS. On the [[S8000]] and [[S8003]] and later, the chip securely generates the UID for the device which is then used to encrypt the whole filesystem. |
Apple says about this key:<br/> |
Apple says about this key:<br/> |
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Revision as of 02:19, 21 August 2018
The UID key (device's unique ID key) is an AES 256-bit hardware key, unique to each iPhone. It's fused into the application processor during manufacturing. It was previously used to encrypt things in the NOR. In later iOS versions, it is used to encrypt the entire file system, so that the flash chips cannot moved to another device and read out there again. On the S5L8960 and later, the SEP has it's own UID in it's own AES Engine, and that UID is the one used to encrypt the filesystem on iOS. On the S8000 and S8003 and later, the chip securely generates the UID for the device which is then used to encrypt the whole filesystem.
Apple says about this key:
"The UID is unique to each device and is not recorded by Apple or any of its suppliers."
and also
"The UID is not related to any other identifier on the device."
See also: GID Key.
