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...n the file "secure_kernel" with extension ".xxx" (on FW 0.931.010 only), ".enc" or ".enp".

...update process. This is in addition (wraps over) to the already encrypted .enc from the update file and is to hinder downgrade attacks (by externally flas Sony can revoke most keys by updating slb2:prog_rvk.srvk, keys in SM SELFs, ENC files keys, etc... But SPKG key cannot be changed else older and current fi

| Attribute || 0x8 || u16|| Corresponds to the revision of the enc/dec key. See [https://www.psdevwiki.com/ps3/Revision_versus_Version Attribu

Original PSP Kirk Enc and Dec

*Changed the SLSK enc key but not any other key.