Steganography is the art of hiding data within other data. Ann sends a message to Bob. With encryption Eve could see the message but not read it. With steganography Eve would not see the message.

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jpeg hide & seek - get password hash [closed]

I'm doing some university work related to digital evidence and I came across a .jpg file that has a high probability of containing something hidden with JPHIDE. JPHIDE uses a user defined pass and ...
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109 views

How can I detect unencrypted self-executing code in JPEG images?

Assuming that I have an infected image containing a self-executing malicious code that targets my image viewer and executes when I open the file. Supposing also that my computer is completely clean ...
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Malicious self-executing code can only exist in EXIF data in JPEG images?

Let's say we got an infected JPEG image that just by viewing it can automatically execute the malicious code stored inside it. It can do this either by taking advantage of the image viewer's security ...
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Image steganography and tracking

We are running an online-press media-library. On this site many brands are uploading images and track press users download and views per image. But some brand now want to add unique code in image so ...
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Does this image contain secret data?

I am analysing big, cloud-based application. During analysis I found that one of the biggest files (>3 MB) used in this app is a very small (16x16) icon.png file. Further analysis revealed that the ...
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1answer
31 views

Malware injected into image.ArticleContentSniffing

I came across below article. https://code.google.com/p/doctype-mirror/wiki/ArticleContentSniffing on of the things that brought my attention is To be on the very safe side, it is best to ...
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How to grade / judge / evaluate a steganography approach?

When it comes to evaluating a text steganographic approach, I think we have to consider these things: How unlikely it is for someone to guess that there is a hidden message in the message being ...
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7answers
1k views

How is it possible to embed executable code in an image

I was reading up on FireEye and came across this NYTimes article detailing a Skype chat where an image was sent that was laden with malware: Quote: To gain access to information on the ...
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4answers
146 views

How can steganography be useful in a social networking and sharing website like Facebook or Reddit? [closed]

The point of steganography is to hide useful messages in other messages so that no one suspects the message to contain secrets and tries to crack the message. The catch is that the recipient should ...
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36 views

Application of digital watermarking for session hijack

I know digital watermarking can protect the media from man-in-middle and replay attack. Is it good also for session hijack attack or phishing attack?
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1answer
175 views

Steganography - retreive secret text by comparing original and text containing picture

I have two pictures: st_original.png and st_secret_key_container.png . The second picture is the same as the first but contains a secret which is the MD5 checksum of some key I'll need to decrypt a ...
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282 views

Printer Steganography/Watermarking

I am referring to the yellow dots which are printed automatically by laser printers. They encode information such as the time the document is printed as well as the serial number. There appears to be ...
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242 views

Distinguishing SSH and HTTPS traffic

Alice is an employee of Chris, and Chris does heavy traffic monitoring via its company proxy. Alice wishes to use a Bob's web service while preserving privacy and confidentiality. She has full ...
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Would 'spam' mail really avoid eavesdropping?

spammimic.com offers a service that 'encrypts' your mail as 'spam', the rationale being that all mail services automatically filter out spam, and so if you're wanting to communicate with someone ...
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1answer
58 views

Masking traffic in another protocol

I remember reading a couple of years ago (I believe it was during the Egyptian Revolution) that hackers managed to bypass government filters by making their traffic appear as another protocol. If ...
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3answers
331 views

Can you recover original data from a screenshot that has been 'blacked out'?

Is there a threat from screenshots with blacked out info? That is can someone take out that after market addition so to speak? For instance I take a screen shot (using MS snipper) Then I ...
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2answers
122 views

Is there an example of a web server that does steganographic watermarking?

You could imagine a web app that serves subtly different versions of a page to each user. For example, it might encode the identity of the user in the images it serves. This would be a per-user ...
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1answer
196 views

What cryptosystem makes the encrypted text look like random noise?

Suppose one wants to setup a cryptographic protocol in which 2 parties communicate using an encryption scheme that produces encrypted messages indistinguishable from random data (the desired property) ...
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2answers
105 views

Embedding hidden data inside files [closed]

I need to embed a unique ID hash string in many types of files, and then verify the hash string inside the files later on remotely. Is there a best practice for doing this?
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254 views

JPEG file SOS marker before SOF

I'm looking over some JPEG files with an assumption that a steganography has been used for trial obfuscation due to the installation of JPHS. I've come across a file where the start of scan marker ...
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1answer
115 views

Unusual image may contain hidden data

I have received an image from a friend. This is the image. is there any way to detect any anomalies in this image. Thanks
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1answer
181 views

F4 Algorithm for Steganography

Jsteg algorithm is vulnerable to statistical attacks because it influences the DCT histogram of an image perceptibly since it equalizes the number of paris of coefficients. F3 algorithm, instead of ...
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1answer
218 views

Efficiency of Steganography with Linear Codes

I have read some papers about steganography using perfect linear codes. The aim is sending more hidden message bits with changing less cover message bits. For example using the parity check matrix of ...
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10answers
2k views

Cryptography that looks like ordinary email

I would like to stay out of the automatic filters in place by security agencies and not be accidentally placed on a no-fly list or such. Say I'm having a political debate with a friend about democracy ...
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6answers
2k views

How can I detect that steganography has been used?

I have seen some of the algorithms which are used to detect if a file is a stego-file or not, but all those algorithms check for specific patterns and are not universal. Maybe there are universal ...
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2answers
128 views

Are there any obvious flaws in this anonymous-receiver communication method using Twitter?

There might be flaws in the following method for anonymous signal reception that I'm not seeing: Alice doesn't know who Bob is. Bob wants to Alice to notify Bob of a particular outcome without ...
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1answer
382 views

Fragile digital watermarking algorithms suitable for PDF embedding

I have a PDF file that I want to embed an invisible and fragile digital watermark. What are the suitable algorithms available for this task?
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187 views

Steganograpjy or Digital Watermarking [closed]

I would like to use the best algorithm to hide 1024-bits inside an image. What is the best option to implement this? Is it by using Steganoraphy (i.e. LSB) or Digital water marking?
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86 views

VCS to manipulate returned trees to prevent leaks? [closed]

I am wondering if there is any system that would change source code trees in subtle from version control systems in ways that are hard to discover (i.e. whitespaces at the ends of lines, perhaps even ...
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1answer
281 views

A filesystem with chunks hidden all over the internet?

I am wondering if there are any implementations of a filesystem (as in FUSE) that would allow me to host a file in chunks steganographically distributed all over the internet. The way I imagine it, ...
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1answer
278 views

Approaching a steganalysis challenge

I am currently doing one of the Honeynet.org challenges, specifically the 13th forensic challenge dealing with steganography. Several PNGs have been provided and participants are to find and extract ...
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729 views

How easy is it to find a password in a huge text file?

Say that my password is PASSWORD1 I have a 10MB jumbled text file. I hide my password in two parts in the text, between > and < so I can find it myself. Then I put the 2 parts together and add the ...
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0answers
221 views

Utility to hide several encrypted messages in single file [closed]

I am interested, are there existing utilities/projects under way devoted to combining encryption and steganography. I would like to - combine two or more messages, encrypted with separate ...
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1answer
289 views

Steganography using all TCP/UDP ports?

I just had an idea, and usually when I come up with one, it turns out it was already invented, so... Is there some standard that would consist of multiple parties sniffing on all of their TCP/UDP ...
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Steganalysis of outgoing traffic [duplicate]

Possible Duplicate: Detecting Steganography in images Is there any commercial traffic monitoring systems that implements steganalysis and could issue a warning upon suspicious file transfer ...
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5answers
7k views

Steganography to hide text within text

Are there any steganography algorithms which are capable of hiding a (optionally encrypted) text message within another innocuous text message? The scenario I envisage is that I would like to carry ...
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3answers
6k views

How do I hide files inside an image without using any steganography tools?

I want to hide files inside a picture. The files may be music or video. Is it technically possible to do this? If so, how? I searched on Google to find methods. Please suggest some methods for ...
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1answer
202 views

Editing images containing hidden information

Suppose we have an image with some hidden info behind it. If we open it in a photo manipulation software like Photoshop or Gimp, without editing it and just save it as a new image, does the image ...
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Is there a way to detect and extract steganographically hidden data from a picture? [duplicate]

Possible Duplicate: Detecting Steganography in images Is there a way to detect and extract hidden data from picture which altered by steganography? For example, If someone tried to spill ...
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5answers
1k views

TrueCrypt dataleaks that might betray the “Deniable File System” option

Reading into "Operation Satyagraha", one would have to believe give all the resources used that the investigators had some reason to believe there was data to decrypt, even though in theory and in ...
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5answers
838 views

Which graphic image formats contain revision history? Does the image editing software being used matter?

It's common knowledge among graphic designers that they can rename a PDF file and import it into Illustrator and access the "layers" within the document, revealing hidden information. I don't know ...
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Is there any way to write-protect a USB or hide its contents from deletion without hardware modifications?

Data on external storage devices are not secure, I understand that. Despite hardware modifications they can still be hacked etc. However files can be hidden (steganography) or encrypted. I'm ...
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What happens if a pro-censor ISP has Telex key(s)?

I've been watching more and more people jump on the idea of Telex as a way to prevent internet censorship (e.g. http://www.technologyreview.com/communications/38207/ -- not my comments at the bottom ...
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Is Steganography a safe method to store secret data?

I want to put some parts of my secret data into specific file with Steganography method. Is this method as safe as other encryption methods like RSA or SHA?
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1answer
751 views

Suggested Steganography Program?

I would like to try a Steganograghy program - know of one? How 'heavy' can it be: 1- Can I run the plaintext through a SHA-2 hash, THEN.... 2- Encrypt the digest with my private key (Digital ...
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4answers
2k views

Is Steganography considered encryption and subject to USA export restrictions?

I have written an application for Apple's iOS which embeds messages in JPEG files using steganography (see http://en.wikipedia.org/wiki/Steganography). For the purposes of this question lets assume ...
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2answers
2k views

Best way for a hacker to hide a file on Linux?

Suppose a hacker obtains a shell on my Linux host and wants to hide a file. What's the best way for him to do this? You may assume unprivileged or root access. My thoughts are Use a .file ...
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5answers
37k views

Detecting Steganography in images

I recently came across an odd JPEG file: Resolution 400x600 and a filesize of 2.9 MB. I got suspicious and suspected that there is some additional information hidden. I tried some straight forward ...
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320 views

Are NTFS Alternate File Streams considered a security risk in your organisation; how is it mitigated?

Alternate File Streams allows a user to embed hidden content within any NTFS file. That file can be a TXT file, or MOV for example. Some may consider this a form of steganography, and therefore the ...