Well I can be wrong, but you can see we need the 2 keys to decrypt it and that I guess is a fact; for example in Bruteforce we have:
"Gran Turismo 5"
[BCUS98114/BCUS98394/BCUS99247/BCUS98272/BCES00569/BCAS20151/BCKS10096/BCJS30050/CEJH10007/BCJS30001/BCAS20154/BCAS20164/BCAS20108/BCAS20229/BCJS30031/BCJS30100]
disc_hash_key=13D222C834F7F2BD2E4CB8CED51B1D94
secure_file_id:*=BDBD2EB72D82473DBE09F1B552A93FE6
Disc_hash_key is one and Secure_id the other.
now we just need the disc_hash_key for GT6 since the secure ID is already out.
"Gran Turismo 6 / GT Academy 2013"
[BCUS98269/BCUS98296/BCES01893/BCJS37016/NPUA30127/NPUA81049/NPEA00502/NPEA90124/NPJA90251/NPHA80259/BCES01977/BCAS25018]
;disc_hash_key=
secure_file_id:*=771D1C71E75B4E70803873F7402511A7
So I guess that's all we need, and for few info I saw around (in other forums), "Flatz" made some tools that could be usefull to retireve it (But I can be wrong of course) PS3 Disc Key Dumper (>>>>flatz dumper.pkgs<<<<
, Klicensee Dumper and Secure File ID Dumper. I just try to be helpfull. But If you decrypted it already it mean in theory that you have the Disc_Hash_Key. If so please share it to us too so we can help too exploring the save and collaborate all togethar, that I meant ^^/