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|-
−| 0x194||0x7C||Unused
The Signature Type is the same const as that in [[TMD]].
| 0xA4||0x2||Unknown
| 0xA4||0x2||Unknown
|-
|-
−| 0xA6||0x2||Ticket title version, this title version is also stored in the [[TMD]].
+| 0xA6||0x2||Ticket title version, this generally the same as the title version stored in the [[TMD|Title Metadata]].
|-
|-
| 0xA8||0x8||Unused
| 0xA8||0x8||Unused
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| 0xE2||0x82||Unused
| 0xE2||0x82||Unused
|-
|-
−| 0x164||0x30||Unknown
+| 0x164||0xAC||Content Index Setup (Complex)
−|}
|}
−The titlekey is decrypted by using the [[AES]] engine with the ticket common-key keyslot where the keyY is one of 6 keyYs loaded via the keyY index stored in the ticket. AES-CBC mode is used where the IV is the big-endian titleID. Note that on a retail unit index0 is a retail keyY, while on a dev-unit index0 is the dev common-key which is a normal-key.(On retail for these keyYs, the hardware key-scrambler is used)
The titlekey is decrypted by using the [[AES]] engine with the ticket common-key keyslot where the keyY is one of 6 keyYs loaded via the keyY index stored in the ticket. AES-CBC mode is used where the IV is the big-endian titleID. Note that on a retail unit index0 is a retail keyY, while on a dev-unit index0 is the dev common-key which is a normal-key.(On retail for these keyYs, the hardware key-scrambler is used)
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== Some facts==
== Some facts==
−* '''CommonETicket''' (for short, '''cetk''') is the name given to tickets for titles which aren't purchasable, like system titles.
+* '''CommonETicket''' (for short, '''cetk''') is the name given to tickets for titles which available on the [[EShop|eShop]], like [[Title list#CTR System Titles|system titles]].
* '''CETK''' can be fetched through HTTP using the link to default update server, using the title's [[TMD]] URL where "cetk" is used instead of "tmd" for the URL. The 3DS NIM module retrieves system tickets via SOAP request ''GetCommonETicket''.
* '''CETK''' can be fetched through HTTP using the link to default update server, using the title's [[TMD]] URL where "cetk" is used instead of "tmd" for the URL. The 3DS NIM module retrieves system tickets via SOAP request ''GetCommonETicket''.