If you've been missing jas0nuk and his PRXdecrypters for the PSP, don't worry. He's just made an appearance recently, along with the latest version of his homebrew app, PRXdecrypter v2.1. See what's new on the changelog after the jump.


Download: PRXdecrypter v2.1

jas0nuk has released version 1.8 of his PRX decryption application known as PRXdecrypter. The application's had a lot of changes from PRXdecrypter v1.7, but perhaps the most impressive of these changes is the app's new ability to extract special PRXs from updater executables.

The full changelog after the jump!

Download: PRXdecrypter v1.8

Jas0nuk has released a new version of PRXdecrypter, bringing this psardumper mod up to version 1.7. This version of PRXdecrypter has quite a few improvements, so check out the changelog below to see what's new.

• Fully compatible with HEN/2.71/3.xx kernel/3.60 M33 - Just copy PRXdecrypter_3XX folder to GAME. Have fun, firmware modders.
• OE and M33 users should also use this version, just put it in GAME352 or GAME (if you have that set to the 3.52 kernel)
• 1.50 users (if any of you still exist) or those who want to use the 1.50 kernel, use the kxploited version.
• I will maintain this version in case the 3.XX kernel changes significantly which breaks PRXdecrypter
• Added 3.60 and 3.7X keys
• HEN/3.XX version doesn't need sysmem_rlz.prx for RLZ decompression as it uses the function from the 3.xx kernel
• Huge internal cleanup with clearer messages, better error handling and more speed.
• Improved logging (logs almost everything now)
• Press O to UnSignCheck all files in the ms0:/enc folder
• Press RIGHT on the D-PAD to extract reboot_02g.bin from loadexec_reboot_02g.prx (from 3.60 or higher)

Please note that the HEN/3.xx version will not run on the 1.50 kernel and vice versa. Jas0nuk also mentions that "SystemCtrl.prx from M33 3.52-3 or higher will not decompress as it uses a custom SignCheck". This feature may be added in a future version, though.

Read the bundled readme.txt file carefully for more information before you install this app. The well-being of your PSP could depend on it.

Download: PRXdecrypter v1.7

Itching to use a psardumper to peer into PRX files? Then jas0nuk's prxdecrypter is just the tool for you. Now updated to version 1.6, prxdecrypter has smoothed the rough, buggy edges, plus it comes with six more key sets (gameshare keys of 1.XX, 2.00-2.50, 2.60-2.71, 2.80, 3.00, and 3.10+).

Keys from 3.60 and 3.70 have yet to be added, so these are what you can expect from prxdecrypter version 1.6:

• Now comes with a HEN compatible EBOOT which doesn't seem to work properly (partially broken on 3.xx kernel on the fat PSP, completely broken on 3.60 M33 due to new hardware)
• Fixed 2.7X demo decryption (wrong key)
• Now uses the entire buffer - previously, files over 4mb would fail
• Added second layer of descrambling to a few files - this would have produced messed up output if you tried in the old version

In addition, five keys were found useless and discarded, while exiting from the homebrew application can now be achieved by pressing TRIANGLE rather than the HOME button. As always, take great care to go through the bundled documentation before utilizing the application. It could do harm in the hands of the careless.

Download: prxdecrypter v1.6 with HEN-compatible EBOOT

Jas0nuk has released a new version of decrypter303, only it's now known as prxdecrypter. Aside from the name change, version 1.2 includes support for the recently released firmwares 3.10 and 3.11.

Just to refresh your memories, this homebrew app is a psardumper mod that can "decrypt individual modules from all known retail firmwares". It also works with all current game PRXs. Currently, prxdecrypter cannot decrypt game Eboot.bin files, but jas0nuk is working on this feature. Right now, though, he says that you'll get an "unknown tag C0CB167C" error if you try it due to differences in encryption.

For installation instructions and more information about prxdecrypter, make sure to read the readme file included in the download.

Download: [prxdecrypter v1.2]

Dark_Alex has released yet another breakthrough in the quest of PSP firmware supremacy! He has just released his 2.7X PRXDecrypter application, which does exactly what it sounds like. It can decrypt PSP firmwares that previously couldn't be decrypted such as 2.7. Dark_Alex has only tested it on 2.71m, but the test came out successful, so you can bet on it working for firmwares 2.6 and 2.70.

Just like Dark_Alex's other programs 2 PSPs are needed, a 1.5 PSP and a PSP running firmware 2.6. Here's the instructions on how to use it:

1.50 part

1. Copy __SCE__psar_dump2 and %__SCE__psar_dump2 to /PSP/GAME/ in the memory stick.
2. Get the DATA.PSAR of the EBOOT.PBP of the update you want to decrypt (2.71 for example) and put it in the root of your memory stick
3. Start the program.
   

This is simply a psardump (PSpPet) mod that will dump the firmware ENCRYPTED to /F0 and with the correct paths.

2.60 part

1. Be sure you have the F0 folder with the ENCRYPTED dump obtained in the 1.50 part.
2. Copy prxdecrypt27X to /PSP/GAME/ and start the program with the eLoader.
3. The memory stick will flash for some time. When it finishes to flash, restart the PSP.
   

You'll now have the decrypted firmware in a new created folder: /FD

So, what does this mean for homebrew? Well, it could lead to an exploit being found in firmware 2.7 if there is one present. I am in no way saying that there is one or this will lead to homebrew on 2.7 so please do not jump to conclusions. It could also lead to 1.5 users being able to launch firmwares 2.6 and 2.7/2.71 on DevHook; so stay tuned to PSPupdates!

Download: [2.7X PRXDecrypter]