PRXdecrypter 2.4b also known as PRX decrypter for firmwares upto 6.20 has just been release a few days ago . PRXdecrypter 2.4b is a pretty cool PSP homebrew tool that is aim for PSP Dev and newbies who want to get into homebrew . This tool will help decrypt PSP Firmware 6.20 according to the developer . PRXdecrypter 2.4b was develop and release by PSP Homebrew Developer jas0nuk . PRXdecrypter 2.4b was release on March 29th of 2010 . So go ahead and get the latest version of PRX decrypter and start decrypting away . Thanks E-Zone for the heads up . on this release .

This is what the developer had to say about PRXdecrypter 2.4b

Here is PRXdecrypter 2.4b – a minor update, with all the keys up to 6.20 courtesy of bbtgp, who spent many hours reversing to get them, whereas I just spent 10 minutes updating my source code.

- Decryption error for an old key, tag 0×4C940AF0, fixed.
- Decryption key added for pops_04g.prx from 6.XX firmwares – tag 0×457B1EF0
- Slightly more information when encryption is likely to fail (SHA-1 check warning)
- NOTE: key for tag 0×2E5E10F0 does not appear to be working due to a new encryption method. I’ll look into it.
- New EBOOT.BIN key added for tag 0×2E5E12F0. As above, might not work.