Sealedkey / pfsSKKey

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The Sealed Key is a an encrypted key used on PS Vita, PS4 and PS5 to prevent files modification and extraction. It can be found on different places in the filesystem and is used for Save Data and Trophy Data decryption and encryption.

See also PS Vita Sealedkey.

PS4[edit | edit source]

Location[edit | edit source]

The sealedkey file is located in the folder of every savedata/trophies. It is not PFS encrypted.

Kind Path
Trophy /user/home/User Id/trophy/data/sce_trop/sealedkey
Save Data (internal HDD) /user/home/User Id/Title ID/save data directory/sce_sys/
Save Data (USB Storage) /PS4/SAVEDATA/User Id/Title ID/<sealed_filename>.bin

Structure[edit | edit source]

  • Size is always 96 bytes.
Offset Size Description Notes
0 8 Magic "pfsSKKey" standing for PFS SealedKey Key
0x8 2 #Keyset
0xA 6 Padding Zeroed
0x10 16 IV AES-128-CBC IV for use with the pfsSKKey__EncKey Key
0x20 32 Encrypted Sealed Key
0x40 32 Digest HMAC-SHA256 digest for use with the pfsSKKey__Secret Key
  typedef struct {
      const char magic[8];
      unsigned short keyset;
      unsigned char reserved[6];
      unsigned char iv[16];
      unsigned char encrypted_sealedkey[32];
      unsigned char digest[32];
  } sealed_key;

Keyset[edit | edit source]

Keyset System Software version Notes
1 1.01-1.73
2 4.55
3 ?4.70?
4 5.05
5 ?
6 ?
7 ?
8 ?
9 ?
10 ?8.00?-12.00

For example, in PS4 4.55 kernel, the function sceSblSsDecryptSealedKey checks that the keyset is less or equal 2 before calling sceSblSsDecryptWithPortability.

Usage[edit | edit source]

With code execution in PS4 kernel, the sealed key can be decrypted by asking the PS4 kernel: