Amazon and DRM changes

[pdurrant]

Please ask questions about the key extractor at Sats' github repository: https://github.com/Satsuoni/DeDRM_tools/discussions

Further questions here will be deleted without comment.

[Sats]

Right. Not sure if it applies to "details" or not, please delete if so, but a note:
bustacap and myself have discovered Kindle for PC 2.7.1 sometimes downloads files in AZW3 format (which I mistakenly called "maybe mobi"). Those work with normal dedrm. Before asking me about a particular book, please check if it is KFX in the first place. There is no particular rhyme or reason, and even a comic book released in May 2025 might not use latest KFX.

Edit: I will open discussions on github for a bit. Do not expect it to last please.

[pdurrant]

Thanks for your understanding. Info about which formats a particular bit of software downloads is fine.

[markbnj]

As an FYI, in case you haven't heard of it (I only discovered it this week!), Freda is a book-reader that can read lots of formats, and even plays well with my calibre server.

Hopefully others will find this useful!
Cheers;

[odamizu]

Originally Posted by Sats

Right. I guess I will "poke the bear", so to speak ... Windows (x86 support) only.

Originally Posted by DNSB

... Then open Task Manager, right click on the Kindle (32 bit) app ...

Congrats to Sats!

What I know about Windows could fit in a thimble (I'm a Mac person), but out of curiosity and for any Mac users who might be using virtual machine software, will this work on current versions of Windows (11??), or does x86 and 32 bit mean you need an older version of Windows? I.e., what versions of Windows will this run on?

[xyzzy_foo]

Originally Posted by Sats

Right. Not sure if it applies to "details" or not, please delete if so, but a note:
bustacap and myself have discovered Kindle for PC 2.7.1 sometimes downloads files in AZW3 format (which I mistakenly called "maybe mobi"). Those work with normal dedrm. Before asking me about a particular book, please check if it is KFX in the first place. There is no particular rhyme or reason, and even a comic book released in May 2025 might not use latest KFX.

Edit: I will open discussions on github for a bit. Do not expect it to last please.

What the DVDFab team did wasn't actually cracking the latest DRM, but rather a hack to download KFX files that had older DRM applied to them.

That's why I was thinking that KF8 (AZW3) might also be obtainable somehow. Because BlueStacks' K4A actually rejects KFX for some reason and can get a combination of KF8 (AZW3) and AZW6 instead.

I was thinking that if we could figure out the detailed conditions behind this "some reason," we could get KF8 (AZW3) and AZW6 even with the latest version of K4A. It's just that you did actually do the same thing on the K4PC.

Epubor must be thrilled to see your results.

Originally Posted by odamizu

Congrats to Sats!

What I know about Windows could fit in a thimble (I'm a Mac person), but out of curiosity and for any Mac users who might be using virtual machine software, will this work on current versions of Windows (11??), or does x86 and 32 bit mean you need an older version of Windows? I.e., what versions of Windows will this run on?

64-bit Windows can run 32-bit Win32 apps through WOW64 (Windows 32-bit on Windows 64-bit). K4PC doesn't provide 64-bit binaries. I haven't tested this yet, but the key extractor seems compiled for x64, which means it won't run on 32-bit Windows. Since there's no 32-bit version of Windows 11, if you try it on Windows 11, you should definitely be able to get it working.

[Laburge]

I installed Windows 11 USA on purpose and get the same response (as on Windows 10 japanese).
Apparently the utility works only for the author.
https://www.mobileread.com/forums/at...1&d=1747976560

Or it doesn't support Japanese editions, which is also likely.

[bustacap]

Originally Posted by Laburge

I installed Windows 11 USA on purpose and get the same response (as on Windows 10 japanese).
Apparently the utility works only for the author.
https://www.mobileread.com/forums/at...1&d=1747976560

Or it doesn't support Japanese editions, which is also likely.

the issue is that your command line arguments are wrong

[Laburge]

Originally Posted by bustacap

the issue is that your command line arguments are wrong

what's the arguments then?
when you run the utility, it says:
1. memory file
2 and 3 i been swapped and no result.

If 1 was set not to memory, the utility did not work at all.

And what is the error with Font? (it can be only in one case, there is no Japanese language support in the utility itself).

If you try to specify purely file names that lie in the same folder = the utility doesn't work at all.

What is the syntax of the utility?

[bustacap]

Originally Posted by Laburge

what's the arguments then?
when you run the utility, it says:
1. memory file
2 and 3 i been swapped and no result.

If 1 was set not to memory, the utility did not work at all.

And what is the error with Font? (it can be only in one case, there is no Japanese language support in the utility itself).

If you try to specify purely file names that lie in the same folder = the utility doesn't work at all.

What is the syntax of the utility?

it tells you what you need to enter. also read the mod message a few posts before yours

[Laburge]

Originally Posted by bustacap

it tells you what you need to enter. also read the mod message a few posts before yours

https://github.com/Satsuoni/DeDRM_tools/pulls - forked address

https://github.com/noDRM/DeDRM_tools/issues - this page opens when you try to ask a question

And now a question: how do I refer to the author of fork and not the original author? (there is no answer in the moderator's words)

Plus that books in Japanese on windows US don't load, hangs the download and after with an error terminates.

https://www.mobileread.com/forums/at...1&d=1747991439

that's all the information given by the developer and I don't understand what the 3rd point is and where to get it.

If mean the file I want to get, the author didn't write anything about the converter.

If I specify only 2 parameters, the utility fails again. (Oh yeah, I don't understand anything at all about commands under DOS (initial linux system admin))

If you don't know the answer, your words about the wrong command are invalid.

[lkmiller]

Here is where you can discuss the fork by Sats:
https://github.com/Satsuoni/DeDRM_tools/discussions

[bustacap]

Originally Posted by Laburge

https://github.com/Satsuoni/DeDRM_tools/pulls - forked address

https://github.com/noDRM/DeDRM_tools/issues - this page opens when you try to ask a question

And now a question: how do I refer to the author of fork and not the original author? (there is no answer in the moderator's words)

Plus that books in Japanese on windows US don't load, hangs the download and after with an error terminates.

https://www.mobileread.com/forums/at...1&d=1747991439

that's all the information given by the developer and I don't understand what the 3rd point is and where to get it.

If mean the file I want to get, the author didn't write anything about the converter.

If I specify only 2 parameters, the utility fails again. (Oh yeah, I don't understand anything at all about commands under DOS (initial linux system admin))

If you don't know the answer, your words about the wrong command are invalid.

i know the answer, but i also read the mod message. and which arguments are needed are also clear.
i mean you couldnt even find the link to the discussions?
https://github.com/Satsuoni/DeDRM_tools/discussions

[Sats]

Laburge, See above. In particular, see screenshots here for correct usage. Note Japanese separators in command line, indicating, likely, Japanese system.
Also, at least 3 people, to my knowledge, have used provided utility successfully, so it is not limited to myself.

[Laburge]

Originally Posted by Sats

Laburge, See above. In particular, see screenshots here for correct usage. Note Japanese separators in command line, indicating, likely, Japanese system.
Also, at least 3 people, to my knowledge, have used provided utility successfully, so it is not limited to myself.

Alas my the main japanese system.
Usually questions are asked on github in Issues, then the author of the topic moves the question to Pull requests or closes (this is the first time I've seen questions asked in discussions).

I'm still in the key stage and don't have a key yet.

Thanks for the answer.