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975 bytes added ,  21:30, 22 December 2019
→‎Gamecard savegame Encryption: Add summary table for encryption
== Gamecard savegame Encryption ==
 
Gamecard encryption is AES-CTR applied on top of DISA container, but below the wear leveling layer (if exists). The same key Y used for encryption is also used for DISA CMAC signing. Several versions of encryption scheme have been introduced over the time.
 
{| class="wikitable" border="1"
|-
! FW Introduced
! Old3DS
! [[AES#Keyslot|AES Keyslots]] (Encryotion / CMAC)
! Key Y generation method
! Repeating CTR
|-
| The initial version
| style="background: #ccffbb" | Yes
| 0x37 / 0x33
| v1
| style="background: #ccffbb" | Yes
|-
| [[2.0.0-2]]
| style="background: #ccffbb" | Yes
| 0x37 / 0x33
| v2
| style="background: #ccffbb" | Yes
|-
| [[2.2.0-4]]
| style="background: #ccffbb" | Yes
| 0x37 / 0x33
| v2
| style="background: #ffccbb" | No
|-
| [[6.0.0-11]]
| style="background: #ccffbb" | Yes
| 0x37 / 0x33
| v3
| style="background: #ffccbb" | No
|-
| [[9.6.0-24|9.6.0-X]]
| style="background: #ffccbb" | No
| 0x1A / 0x19
| v2?
| style="background: #ffccbb" | No
|}
=== Repeating CTR Fail ===
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