IT Security Stack Exchange
IT Security Stack Exchange

Questions tagged [watermarking]

Designed to be invisible, digital watermarking is the process of hiding information in digital media files, like images, videos and audio clips. Watermarking is heavily used in copyright protection of digital media.

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Is it possible to embed information that is both nearly invisible to the naked eye and decodable from an external camera?

I am interested in watermarking a video for copyright purposes. The requirements are as follows: The watermark must be barely noticeable to the naked eye. The watermark must be able to be extracted from a device such as a smartphone camera.…
Zac R.
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Do digital cameras perform steganography / watermarking?

It is well documented that one should consider that all modern printers perform steganography / watermarking in the back of their users. Is such a feature also documented / are there rumors of similar features with the raw pixel matrix coming out of…
Zorglub29
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Hidden digital watermark in a website which can survive .jpg screenshots?

I'm trying to embed a secret watermark in a website so that I can link any screenshots to the user who created them. The page looks something like this: It has a custom background (user can change it by providing a link) on top of which there's a…
Gavriil Pascalau
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How to find out if our files are digital watermarked?

How do we find out if our files (audio, images, pdf, videos) are digital watermarked by the distributors?
user160411
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Verify that data submitted by user was produced by my app

I'm designing an app (for PC), that is intended to run on users' machines and generate a file with some data. The user will then upload the file to the server, and I want to verify that this file has been produced by my app and hasn't been modified.…
Peter Trifanov
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Does Skype use audio watermarking?

Today on CNN they conducted an interview with a career criminal, who spoke by Skype on condition of anonymity. It occurred to me that, if Skype uses digital watermarking to embed identifying information in the audio stream, then this criminal has…
Psychonaut
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Per-User Image DRM for Finding a Leaker?

I'm managing a client that distributes their users images and files through one source. My background is heavily in development as opposed to security, and I'm of course familiar with some tricks that tickle the development side (MD5, etc) but…
sterbenz
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Can someone hack printer/photocopiers or buy printers/photocopiers that doesn't obey EURion constellation security measure

I'm not into counterfeiting. There was a debate.., so I decided to go deeper with curiosity. EURion constellation is a pattern incorporated into banknotes. So photocopiers and printers if they obey the rule will not copy/print your banknote. My…
kelalaka
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Flow watermarking / fingerprinting

It is known that flows can quite easily be fingerprinted and watermarked [1] (usually observing or adding jitter to packets). Let's say someone added a watermark to my flow which then passes through a VPN connection where multiple flows with the…
worxli
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Digital watermarking for detecting Copyright infringement - video file of customer A and B have same SHA Checksums?

Sometimes I buy in a online shop video files (mp4). The online shop forces it's customers to buy with verified real name. In case of leaking his content the shop can identity who leaked it. I don't know how he does it technically, I guess some sort…
Sybil
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How to steganograph ownership information into members uploaded images?

Considering a social website where members upload images which at times can be very similar - is there a way that images can be 'branded' steganographically with (salted+encrypted) text that identifies the owner's username and the date they uploaded…
Bendy
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Eliminating possible watermarking done by text editors

On which text editor is it easiest to prevent and/or eliminate watermarking? Pre-installed malware that defeats anonymity being used on an airgapped system can be made ineffective, at least partially, by making sure the device does not have any of…
Patriot
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What is the mechanism to protect photos uploaded on social media?

I know water mark the photograph is one method to protect ones copyright over the picture. is there any other technique through which one can prevent or detect the plagiarism of photos.
Sumo
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Invisible, Non-invertable, public, robust, replicated watermarking scheme?

Is there a watermarking scheme for images and audio that is: Invisible - should be imperceptible for a human. Non-invertable - cannot be removed by any means without the original. Robust - in order to destroy the watermark you have to spoil the…
user47376
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Is possible to apply an inverse function to remove a compiled object?

I create a watermark with photoshop like this To make this watermark I use a software functions of a software (for example photoshop). Functions is implement like set instructions (my variables) a, b,c,d function is like this f(x) = a,b,c,d set…
Jacky Ned
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