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→Encryption
=== Encryption ===
=== Encryption ===
The extended header, the [[ExeFS]] and the [[RomFS]] are encrypted using 128-bit AES CTR. See here regarding the [https://github.com/3dshax/ctr/blob/master/ctrtool/ncch.c CTR].
The extended header, the [[ExeFS]], and the [[RomFS]] are encrypted using 128-bit AES CTR. See here regarding the [https://github.com/3dshax/ctr/blob/master/ctrtool/ncch.c CTR].
The key is generated using the [[AES|AES Engine]] key generator, where the keyX is set by the bootrom (see below for the keyslots) and the keyY is the first 0x10 bytes of the NCCH signature. This method of key generation is referred to as "secure-crypto".
The key is generated using the [[AES|AES Engine]] key generator, where the keyX is set by the bootrom (see below for the keyslots) and the keyY is the first 0x10 bytes of the NCCH signature. This method of key generation is referred to as "secure-crypto".