PSSE
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What is PSSE?
PSSE Stands for PlayStation Suite Encrypted, its an encryption layer that encrypts a PSM game's filesystem, its comparable to PFS in alot of ways, however it seems there was a bug at sony where besides executable files, the first directory level of a PSM app is not encrypted with PSSE, its only directory levels below the root of RO/
also PSM SaveData does not get PSSE Encryption applied.
Data Structure
| offset | value | description |
| 0x00 | 0x50535345 (ASCII "PSSE") | Magic Number / File Header |
| 0x14 | CONTENT_ID | Contents of /RW/System/content_id |
| 0x40 | Signature | Generated by PSMSDK 'publisher key'? - Similar to sce_sys/clearsign file of NpDrm-Encrypted apps |
| 0x180 | Encrypted Keys | Generated by PSMSDK 'app key' and 'app seed'? - Similar to sce_sys/keystone file of NpDrm-Encrypted apps |
| 0x680 | Encrypted Data | Actual cipher-text for the encrypted file |
Decryption
PSSE Can be decrypted using the http://bitbucket.org/SilicaAndPina/FuckPSSE plugin by SilicaAndPina