Tools Snapshots of NiLuJe's hacks

[zooterkin]

Originally Posted by famewolf

You need to install the MKK package which updates the signatures so the package is authorized. See the first post.

I've done that, but still get the error when I try to open the KUAL document. Tried various solutions presented here, but it's hard to know what's still relevant.

I've got a Kindle Keyboard 3.

It looks to me as though the current set of archives need to be updated as something has timed out. Is this planned?

I'm probably not going to spend any more time on getting KUAL working, as I suspect it doesn't add much for me. I got launchpad and KOReader working, and will probably look at Calibre integration and USBNetwork next.

[rafikius]

Originally Posted by chaitanyaI

for all who have issue that "The title is not signed by a registered developer"
I found a temporary solution until developers pitch in to correct the issue.
This is the only solution that worked for me on KPW1 after 3 days and multiple resets. Upgrade to 5.6.1.1 finally after everything worked for me.

Brother!

Your advice saved me from turning gray haired too early!
it was updating firmware to 5.6.1.1 that solved the issue of the "signature" error.

as of 15 of June 2026 I confirm the above described methodic has allowed me to lunch Kual and install KOReader on my PW1 with 5.4.4 firmware.

[thewoz]

so this is the holy grail of the kindle jailbreaking, its nice to be here! I am developing apps for my kual more specifically a habit tracker.

[kokoko]

Are the certs expired again?

I am trying to install Koreader. The common path is

• jailbreak (done - Update_jailbreak_k3w_install.bin)
• mkk (done - Update_mkk-20141129-k3w-B008_install.bin + Update-mkk-20250419-k3w-B008_keystore-install)
• kual (stuck here - KUAL-KDK-1.0.azw2)
• koreader (not tried)

The issue with running KUAL is "The title is not signed by a registered developer.".

I have found the thread that everyone mentions - https://www.mobileread.com/forums/sh...postcount=1295 - and installed the "Update-mkk-20250419-k3w-B008_keystore-install.bin" which should have uppdated the keystore - but it still doesn't work. I even tried to copy the new KUAL (KUAL-KDK-1.0.azw2) to the reader again (just to be sure) and I am still getting the infamous error.

I also tried to set date to past, but it i wasn't successful (Seems that this kindle (3, firmware 3.4) doesn't really support it directly (only time can be changed) - I also tried to set it through ;debugOn, date "commands" but it did not work).

[Frogm4n]

Did you leave the wifi on? That will break the MKK certs until you block it from talking to Amazon servers.

[kokoko]

Originally Posted by Frogm4n

Did you leave the wifi on? That will break the MKK certs until you block it from talking to Amazon servers.

No, the Wi-Fi was off the whole time, but thank you for the tip.

I made it work eventually - but I'm not sure what helped (posting here as it might help others):

• factory reset
• i updated from firmware 3.4 to 3.4.2 and then to 3.4.3 (latest there is for this Kindle)
• (few rounds of installing jailbreak, mkk, mkk update, kual, -> error, factory reset..)
• then in one round i actually did NOT install the mkk update that is supposed to fix the KUAL issue, just the original MKK (I wasn't sure this would help, i just tried to run KUAL without the update and...voila, it worked)