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Redaction security

New Here ,
Feb 24, 2020 Feb 24, 2020

Hi

 

I want to test security on a redaction i have made - please can anyone tell me if the attached document can be unredacted. 

 

Thanks

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General troubleshooting , How to
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LEGEND ,
Feb 24, 2020 Feb 24, 2020

Did you redact it using the Redaction Tool in Acrobat Pro DC?

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New Here ,
Feb 24, 2020 Feb 24, 2020

Its actually been redacted by a colleague telling me its secure. I dont know how it was redacted but i dont believe it is secure which is why i would like someone to tell me what is under the "redaction" box so i can prove it isnt secure. 

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Community Expert ,
Feb 24, 2020 Feb 24, 2020

Hi,

It was not done with Adobe Acrobat, or at least I do not see that, because it only has one box on top, Adobe's cencura options erase the content of all its layers.

It says Test under the box.

Regards,

WbolanosCo
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New Here ,
Feb 24, 2020 Feb 24, 2020

Thank you! As I suspected. 

 

I have added another file. Please can you confirm the redacted character for me also?

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Community Expert ,
Feb 24, 2020 Feb 24, 2020

When returning an image, rasterized the content, it may be an option, but I do not think that a practice of the digital document, reviews Acrobat's options.

 

https://helpx.adobe.com/es/acrobat/using/removing-sensitive-content-pdfs.html 

WbolanosCo
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LEGEND ,
Feb 24, 2020 Feb 24, 2020

Countless people think they find ways to redact using tools not made for the job, and without the inside knowledge of PDFs which is needed as a basic starting point. This is no job for amateurs. There's much faith in the magic powers of black boxes, reprinting to PDF and so forth. There's certainly no understanding of forensics, metadata, font internals, or statistical reconstuction.

Sometimes this has led to very severe consequences. Such as https://www.schneier.com/blog/archives/2005/05/pdf_radacting_f.html

https://caseguard.com/evidence-blog/true-cost-failing-redact-properly

https://www.theregister.co.uk/2016/01/17/pdf_redaction_is_hard_nsw_medical_council_finds_out_the_har...

.

In this group we are concerned with Adobe's products, so it's easy to say the right thing to do... 

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New Here ,
Feb 24, 2020 Feb 24, 2020

I get that and i agreee with you however I would like to be able to prove to the person that "redacted" the document that it isnt redacted. Without that proof i wont get them to change the method i dont believe. 

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Community Expert ,
Feb 24, 2020 Feb 24, 2020

Asking some people on an online forum to look into it for you is not "proof" of anything. There are forensic document specialists who charge large sums of money for this kind of work, and if you don't do it correctly they could probably retrieve the information from your document, even if we can't.

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Community Expert ,
Feb 24, 2020 Feb 24, 2020

That good articles, this is how I say it would not be a good practice, and for them we have tools like Acrobat and they are great, in addition to easy to use, thanks for that message.

WbolanosCo
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New Here ,
Feb 24, 2020 Feb 24, 2020

Were you able to see the "redacted" character from sample2.pdf attached?

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Guide ,
Feb 24, 2020 Feb 24, 2020
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There are many applications that open, view, print and allow PDF editing.  I get asked all the time my thoughts on some of them,  This thread is exactly why I always 'preach' to use the ADOBE product. 

 

Dave

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