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> Breaking Keyring PDF

 
post May 12 2014, 01:57
Post #81
Greatquestion



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Genl, I have tried to pm you, but It doesn't seem tto be going through. I have a CDP file I would like broken. Here is the link, please pm me so I can message you the login info. thank you.

www.jonathanh.net/wp-content/uploads/2014/05/RJ133897/egpk5.cpd
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post May 12 2014, 10:10
Post #82
genl



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QUOTE(Greatquestion @ May 12 2014, 01:57) *
Genl, I have tried to pm you, but It doesn't seem tto be going through. I have a CDP file I would like broken. Here is the link, please pm me so I can message you the login info. thank you.

I got both of your messages. You were probably getting impression there was a problem because you didn't get them saved in Sent folder, but that is disabled by default and can be changed on the PM input page.

You got my reply.
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post Aug 8 2014, 07:16
Post #83
lovehcomics



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Hmm, this thread is tempting me to get a HDMI/DVI recorder with a 'splitter' (read:HDCP stripper) but I don't have that kind of cash. It would make such things trivial no matter how they changed the software. No real hacking skills required other than having a few hundred dollars, hehe.

1) Get the hardware (optional but recommend to get the HDMI 'splitter').
2) View the file full-screen on a 2nd PC with HDMI output.
3) Take screenshots using software compatible with the video capture card.
4) Share them with your friends.
5) Pray that you don't get bitten by watermarks and living in a country where they'll happily send you to jail on Japan's behalf. XD

This post has been edited by lovehcomics: Aug 8 2014, 07:22
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post Aug 8 2014, 08:50
Post #84
genl



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QUOTE(lovehcomics @ Aug 8 2014, 07:16) *
1) Get the hardware (optional but recommend to get the HDMI 'splitter').
2) View the file full-screen on a 2nd PC with HDMI output.
3) Take screenshots using software compatible with the video capture card.

Not only you will have to spend time capturing each image (some works contains >400 images) and spend more time on capturing certain images (some works contain images that won't fit even 4K screens), but you will also end up with a rip that is bigger than original file and/or contains less quality than original. Also, some drm formats cover PDF files, meaning you will have to construct it by hand if you want to view it as a PDF.

I remember seeing certain animated games releasing on torrents as a video-captured footage from VM with really bad quality but the size bigger than original game, and with all the cursor movements. This is the route you are looking into.
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post Aug 19 2014, 13:35
Post #85
genl



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+ .dmme e-books / DMM電子書籍ファイル, used by DMM with DMM電子書籍ビューア app. Original type: ePub (.epub).
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post Jun 5 2016, 15:34
Post #86
genl



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To potential requesters.

1. Small memo about major portals based on my experience, should be accurate enough. May be helpful for beginners.

Attached Image Note that all portals allow you to change your e-mail address and password.

2. For regular purchases, I'd need the login:password of your portal account. In cases where a license/activation key is available, I should not need login:password.
For guest purchases, I'd need the full link to the order/download page that you got on your e-mail, and any details it came with.

3. If you upload the original files under original name (.zip or .lzh as you've downloaded them from portals), I'll spend less time on sorting and identifying works and potential duplicates. It will also allow me to preserve original japanese filenames without problems, you will have no problems unpacking them.

4. Generally, if you plan to decrypt certain work (or all works) with my help, you may skip installing the DRM systems on your pc. Remember that certain works (e.g. old games) may come with a serial key that is only valid for one activation.

5. For Keyring PDF (.krm) specifically, if you installed the DRM system and activated the file yourself, you may be able to pack it into backup file (.krb) - [www.keyring.net] instructions here. You can send me just this .krb file, and I won't need login details to activate and process it. This should work at least for files from Melonbooks DL portal.

6. If you prefer IRC or Tox to forum message system, tell me and I'll help you find me online.
Update: details about Tox

This post has been edited by genl: May 4 2018, 10:07
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post Jun 5 2016, 16:00
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How can you be so based genl?
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post Jun 6 2016, 09:35
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genl



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Can you elaborate?
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post Jun 6 2016, 17:18
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I may not.
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post Jun 19 2016, 10:26
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Poor Geni...
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post Jan 9 2017, 06:58
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nathan19



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I sent you a PM genl, and I apologize for the screw-ups (IMG:[invalid] style_emoticons/default/cry.gif)
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post Jan 9 2017, 07:46
Post #92
nathan19



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genl, you sir, are amazing. thank you so much! I hope you dont mind me asking for more, please? I will PM you and a little bit of something else..
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post Jan 29 2017, 12:46
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genl



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Another note for requesters:
It seems some people are still having problems extracting original images from PDF properly for the gallery. There are multiple threads with discussion about how to properly extract images from PDF, and it's not helping. Some galleries appear to be inflated in filesize by as much as 250% when compared to original file. I always provided decrypted PDF files for the sake of preservation of original file and format. I'm going to stop doing so for the sake of leaving less room for mistakes in your galleries.

In future, when the original file format of your requests is PDF (currently: Keyring PDF, CypherGuard for PDF, Pirates Buster for e-Book), I'm going to only provide extracted images by default, unless I fail to properly extract them. I will only provide original PDF if you specifically ask to do so.

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post Jan 29 2017, 17:14
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Thanks for the good work on the DRM genl.

Unfortunately some people are not aware that (most of the time) images inside a PDF are just rasters in normal JPEG or PNG format. Sending the images directly is not a bad idea.

This post has been edited by blue penguin: Jan 31 2017, 02:22
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post Feb 5 2017, 20:49
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JonJon7



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Hi, Genl

I just recently bought a book from melonbooks and its locked with a password that wasn't provided in the purchase. I was wondering if you can help me out with this please. If you can, i'll send over a PM with the info you need.

this is the file i'm having trouble with:

This post has been edited by JonJon7: Feb 6 2017, 03:29
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post Feb 6 2017, 18:58
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QUOTE(JonJon7 @ Feb 5 2017, 21:49) *

Hi, Genl

I just recently bought a book from melonbooks and its locked with a password that wasn't provided in the purchase. I was wondering if you can help me out with this please. If you can, i'll send over a PM with the info you need.

this is the file i'm having trouble with:

You can either send the login:pass or the .krb file, but for the latter you'll need to properly install Keyring software and activate the file on your pc. It doesn't require password, the activation details are being sent when you download the file from your member area.

This post has been edited by genl: Feb 6 2017, 18:59
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post Feb 12 2017, 12:57
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Someone asked me if images inside the protected container are getting watermarked. For some reason this was never discussed. I think it's very important, but somehow I never properly explained this.

No. On all major portals that use the DRM, amongst various protection schemes I've seen, I've never seen one that would try to add something that could potentially identify particular customer. Image sets, videos, applications, e-books are all the same between all customers of one portal. If I try to decrypt one work using credentials of two different customers, they would end up 1:1 same. Encrypted containers are also same when downloaded by different customers.

The decrypted visual content is always original, nothing gets re-encoded. The situation is different for games and e-books, but only because it's impossible to retrieve the original data in some cases. Cracked copies of those are still functionally equal to originals.
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post Feb 12 2017, 20:44
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QUOTE(genl @ Feb 12 2017, 10:57) *
No. On all major portals that use the DRM, amongst various protection schemes I've seen, I've never seen one that would try to add something that could potentially identify particular customer.
I wonder. If the watermark would be invisible to the naked eye, would passing the image through one series of lossy compression defeat the watermark? I believe that that would be completely enough to kill a steganographic watermark.

(and of course, killing off all EXIF info)
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post Feb 13 2017, 18:15
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QUOTE(blue penguin @ Feb 12 2017, 21:44) *

I wonder. If the watermark would be invisible to the naked eye, would passing the image through one series of lossy compression defeat the watermark? I believe that that would be completely enough to kill a steganographic watermark.

(and of course, killing off all EXIF info)
I never checked the in-depth mechanics of any steganographic library, but I can say that it should be perfectly possible to protect the embedded information from degrading after several (or at least a few) cycles of lossy compression - developers just need to be clever enough to expect such a possibility. It would add to limits of information block size, but then you could guess you rarely need to hide much information to identify someone. Imagine barcode or QR code and you'll understand why it's possible.

Realistically though, steganography just by itself doesn't make much sense here. Nobody would want to hunt down and punish their own customers. It's more logical to discourage everyone from sharing anything on public. Which means: making it absolutely clear that each purchase is watermarked. They could state this on download page and use visible watermarks. Only after that, optional use of steganography may help to find offenders who thought they got rid of all watermarks. In this case they would admit their mistakes instead of feeling disgusted.
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post Feb 13 2017, 22:03
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QUOTE(genl @ Feb 13 2017, 16:15) *
Imagine barcode or QR code and you'll understand why it's possible.
Very good point. If you slightly tint vertical regions with a little darker colour (and slightly lighter colour in between) they will keep that appearance through a lossy pass (and probably through even very invasive lossy passes, e.g. JPEG 30%). Thanks genl (I really like reasoning about image maths).
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