To quote, roughly translated: Today, Yoshihiro presents a tool that will please all the players in the community: Game Decrypter, which will allow owners of games requiring firmware 5.55 can play on Custom Firmwares 5.50GEN-B and 5.03GEN.
To do this, you will get the file EBOOT.BIN an ISO that you created with the utility UMDGen.
Most games asking the 5.55 can be treated with this tool. Some games (list available soon) will be impervious to manipulation, they require a patch to the image of him created to run Soulcalibur: Broken Destiny. But generally, you can finally play your own backups, without having to install official firmware.
What PSP can benefit?
The PSP Custom Firmware 5.50GEN-B. The PSP 2000-v3 and 3000 using the 5.03GEN (use mode driver in the M33 vsh menu).
Stay tuned for more PS3 Hacks and PS3 CFW news, follow us on Twitter and be sure to drop by the PS3 Hacks and PS3 Custom Firmware Forums for the latest PlayStation 3 scene updates and homebrew releases!
PRXDecrypter 2.7a by Rahim-US, J416, FreePlay, and jas0nuk
PRXDecrypter, is an application developed by Jas0nuk initially to decrypt firmware modules, games eboots.bin ... I just updated the PRXDecrypter 2.6b, with new keys for 6.xx and added some features like extracting hidden prx for firmwares 6.xx
Changelog 2.6b --> 2.7a:
Now you can decrypt 6.3X and up EBOOT.BIN
You can extract hidden modules from any DATA.PSP including 6.xx
Decrypt/decompress 6.XX modules.
Keys for 6.XX - 6.60 added.
Log file can be enabled or disabled on app startup (with LTRIGGER)
Small fixes and other changes.
Another update to PRXDecrypter is attached below, although it's an unofficial release from homebrew coder hrimfaxi (http://bbs.a9vg.com/read.php?tid=1461230) it apparently works with Metal Gear Peace Walker (new key tag as UNO, 0xD91613F0) and a few other games (Ikki Tousen Xross Impact and Uno) to decrypt eboot.bin for use with PSP CFW.