PSSE
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What is PSSE?
PSSE stands for PlayStation Suite Encrypted. It is an encryption layer that encrypts the PSM game's filesystem.
The encryption layer is comparable to the PS Vita Filesystem in many ways; however, it seemed that there was a bug at Sony, where besides executable files, the first directory level of a PSM app is not encrypted with PSSE, whose directory level is below the root of RO/. Similarly, the PSM SaveData is not encrypted by such layer either.
Data Structure
| offset | value | description |
| 0x00 | 0x50535345 (ASCII "PSSE" / "PSME") | Magic Number / File Header |
| 0x4 | int32 | Version |
| 0x8 | int32 | Decrypted file size |
| 0x14 | char[0x24] CONTENT_ID | Contents of /RW/System/content_id |
| 0x70 | char[0x10] | Encrypted IV AES-128-CBC with (PSSE Header Key and PSSE Header IV) |
| 0x680 | Encrypted Data | 0x8000 encrypted blocks |
Decryption
PSSE Can be decrypted using the http://bitbucket.org/SilicaAndPina/FuckPSSE plugin by SilicaAndPina