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Questions tagged [steganography]

Steganography is the art and science of writing hidden messages in such a way that no one, apart from the sender and intended recipient, suspects the existence of the message. While cryptography protects the contents of a communication, steganography aims to prevent others from learning that a communication even occurred.

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How to hide a sequence number in the messages that exposed to the public?

Here is the situation: Alice sends msg1, msg2 and msg3 to Bob. Such messages are not always delivered to Bob following the same order. Bob needs to use key1 to decrypt msg1, use key2 to decrypt msg2, ...
1 vote
1 answer
55 views

How to process a message to be embedded using steganography?

Let's say we embed a text using steganography by modifying an existing cover object. What would be the steps needed to be done on the message? I can think of source coding (compression) channel ...
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What are the software tools used for customizing secret sharing and network steganography, which can be used for enhancing secret data transmission? [closed]

My goal is to enhance by bringing some changes to these techniques and schemes so that any improvements can be brought to them. So I tried to find some of the tools and came up with these: Secret ...
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3 answers
223 views

Message Hiding Using Keyed Steganography

i would like to know what are the danger can be occur by performing steganography without a key? Please kindly explain to me.
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How to apply codes to hide information in JPEG images in a more efficient way than F5?

The F5 steganography algorithm hides information in images using binary codes. But when hiding a bit, the affected DCT coefficient becomes zero, it is necessary to hide the same bit again. This is ...
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Is it safe to initialize a random number generator with MD5 for pixel selection in image steganography?

This question is related to "Is it safe to initialize a random number generator with MD5?". But in the context of steganography we don't know which pixels have been selected to hide ...
1 vote
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Accelerating Syndrome-Trellis Codes (STC) for GPU [closed]

From the literature, STC seems to be the current state-of-the-art for the coding part of steganography. From the description of the method, it appears to me it could be parallelized for GPU. Does ...
2 votes
1 answer
78 views

Too many wet positions in Wet-Paper Codes steganography with random H

I am implementing wet-paper codes (WPC) with randomly generated parity-check matrix $H$, based on this paper. As the wet DCT coefficients, I set DCT coefficients with value 0, or with values 0 and 1 (...
1 vote
2 answers
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DCT Steganography - Where to embed the data

Just a quick question about DCT Steganography. Do you embed the data before or after you send the 8*8 block through the quantization table?
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1 answer
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How to build a syndrome trellis from the parity check matrix

Background In the paper "Minimizing Embedding Impact in Steganography using Trellis-Coded Quantization" and in this question on this forum, a so called Syndrome Trellis is built from a ...
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7 answers
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Any efficient text-based steganographic schemes?

Sophisticated and efficient steganographic schemes with images as cover are available. However, I wonder: are there any that use texts as cover instead? If one could only transfer a few printable ...
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Man Made ELS Codes

This is more steganography, not cyptography, but I don't know where else to post this. Are you familiar with ELS (Equidistant Letter Sequence) codes that some have said are found in the Bible? I know ...
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Crypt-analysis for finding information hidden in images?

I was wondering if anyone is familiar with any historical aspects (as to whether someone was able to) for discovering code using images on the web as a transport method ? As in hiding byte values in ...
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How does Syndrome-Trellis Code (STC) work?

Syndrome-trellis code was introduced to minimize embedding distortion in steganography. See this paper: Minimizing Embedding Impact in Steganography using Trellis-Coded Quantization. Background ...
8 votes
2 answers
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Maximum steganographic embedding rate not detectable by steganalysis?

When using advanced steganographic methods (like F5) what is the approximate maximum embedding rate when advanced Steganalysis (like a machine learning approach) can no longer reliably detect it? I ...
1 vote
1 answer
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PSNR and MSE values

I've a program for image steganography where text is hidden in images. What are the ideal values for PSNR(Power signal noise ratio) and MSE(Mean square Error) and how to calculate PSNR and MSE values?
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How to hide multiple types of information in the same file?

I have a vague memory of watching a video of a guy "unraveling the secret story / lore" from the game Doki Doki Literature Club. And I remember that he took a file, converted it to .txt and ...
2 votes
1 answer
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Would this image steganography technique be effective at avoiding detection?

I've observed that when you view only the LSB of an image it is typically random looking, but often has areas that correlate with the over all structure of the image. It's common for there to be large ...
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Can a nonce be used to steganographically hide a message?

If a standard encryption scheme involves a nonce, as most do, can the nonce be used to hide another small message? That is, the nonce (rather than being randomly generated) is a hidden message XORed ...
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Steganography -unhide methods

I'm trying to unhide information in a .bmp image using the tools on https://incoherency.co.uk/image-steganography/#unhide However all I can see when using the tools are at best a black image with a ...
1 vote
2 answers
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Can TLS be used simply to exchange keys using the handshake protocol?

From what I understand, in general, TLS consists of two protocols: 1 - Handshake protocol: uses public-key cryptography (ECDH, DH) to establish a shared secret between the client and server. 2 - ...
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Is the "grain" in this converted image indicative of Steganography?

I'm checking an image in every way I can for steganography. I've checked the file signature, compared it to it's original source and extracted the pixels, many methods but nothing's coming up. ...
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1 answer
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Error correcting codes that are indistinguishable from random

Suppose you have a public program P(n) which takes message n and generates an encrypted output (utilizing asymmetric cryptography) for some entity which has the private key to decrypt it. Using a ...
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1 answer
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Hide Randomness in Ciphertext

Ciphertext has the property to appear random. As a matter of fact, randomness is the first test, an encryption algorithm must pass. However, there are various setups, which monitor the incoming/ ...
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Crypto system design : How to design Encryption for Zero width characters

Zero width character's can be used to hide text in plain sight.I am building a system where user's can provide their secret message , cover message and a password (key) which I would encrypt and give ...
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DCT Steganography Problem

I'm creating an implementation of the DCT Steganography algorithm in Java and I'm having a slight problem. When I embed a message into a cover-image, I am doing so by initially obtaining the DC ...
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Why does the image histogram with ASCII text embedded look this way?

I used histogram attack on image with embedded text ASCII(LSB-method) and found the chi square value. All observed frequencies more than expected frequencies, that is tipical for empty image, and have ...
3 votes
1 answer
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Detecting steganography by analysing non-significant data entropy?

I am not thinking only steganography in images, I think it is also possible to encode data for example into the length of spaces of a clear html text. I suspect, the steganography changes (elevates) ...
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1 answer
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WAV file steganography

I'm trying to find a hidden message in a WAV file. It's a song, not some noisy sound. My question is where should I look for the message in data RIFF, FMT or DATA chunk. Should I convert the file to ...
2 votes
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ASCII characters in an image steganography [duplicate]

Given an image size of 300 by 400, what is the maximum number of ASCII characters (7 bits) that can be embedded using the LSB steganography? I would assume that every pixel can perform an LSB so ...
2 votes
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Possible deciphering methods for the steganography on an old check? [closed]

This check was deposited in the 1930s, and it was issued by OCBL (an old bank in Singapore). The checks issued by this bank had an interesting feature - an obfuscated pattern printed on the back of ...
2 votes
2 answers
1k views

Is there an algorithm to hide text in another text, while preserving the meaning of the latter?

Is there a way to hide a text message $A$ inside another text $B$ using a cryptographic cipher/algorithm, while preserving the sense/meaning of $B$ and without anybody being able to notice there is a ...
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1 answer
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How would I make a decoder agnostic steganographic file?

I would like to make a steganographic file that can be decoded on multi-platforms, now & 20 years from now. I don't want to do so with software that may be out of date when the message decode is ...
1 vote
1 answer
558 views

How does bit-wise operation work for encrypting grayscale images? [closed]

How does bit-wise operation work for encrypting grayscale images? In my Khan Academy course they encrypt an image with bitwise_and, ...
2 votes
1 answer
301 views

Transfer and hide ciphertext with hash functions?

Can hash functions be used to transfer and hide ciphertext? This somewhat similar locked question, "If cryptographic hashes are completely unique, could they theoretically be used to transfer data?", ...
19 votes
1 answer
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What systems of robust steganography are out there?

By robust, I mean resistant to common image transforms (reversal, crop a non-multiple of 8 pixels off and recompress, blur, solarize to 64 levels, then interpolate, and sharpen, change compression ...
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1 answer
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Is there any other steganography algorithm other than LSB?

LSB is most commonly used in steganography. Which algorithm can be used instead of LSB?
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Can a digital watermark be still extracted from the reprinted digital watermarked image?

If I'm able to extract a watermark from a printed watermarked image, will I be still able to extract the watermark information if I first scan the printed watermark image and reprint it (make a copy ...
2 votes
2 answers
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Is steganography valid only for digital images or also for printed images?

If I embed some information in an image using steganography and then I print that image, will I be able to retrieve information from the printed image or not?
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How to steganographically embed data in cropped/resized images?

The problem: An artist posts an image of their work online with a creative commons attribution licence (on site A), someone reposts the image with attribution on another site (site B), the internet ...
2 votes
3 answers
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Steganography - How many bytes of information can you hide in a $1024 \times 768$ photo?

I have a photo with a resolution of $1024 \times 768$ which means $786432$ pixels in total. Let's suppose it's a 24-bit color RGB image (so 1 pixel = 3 bytes = 24 bits) and I want to hide information ...
1 vote
2 answers
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How can I retrieve data embedded in an image with steganography?

I want to know is there any way to retrieve data embedded in a steganalised image by just scanning the image with mobile scanner? Just like qr code scanning
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Can I use steganography to detect data loss that occurs due to gradual degradation in quality in sequential printing of black and white noise texture?

I want to detect original print and a reproduced print. So if I embed some information in this kind of noise texture, after reproducing the original print there might be some loss in information due ...
2 votes
1 answer
1k views

Can one hide a text in an image and then hide that image in another image? [closed]

Using a steganographic algorithm like least significant bit, can one hide a text in an image and then hide that image in another image?
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Ciphertext indistinguishability under a noisy channel w/ error correction

The objective is to broadcast information over a noisy digital channel (corruption rate of say, 10-20 %, where bits flip). Assume the broadcasting software is public and there is no possibility of ...
3 votes
4 answers
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In English, are there any words which encrypt to other words under the Caesar Cipher?

Are there any words in the English language which, when encrypted using the Caesar Cipher with any key, result in another English word? How may one go about determining which Caesar shifts are weakest ...
1 vote
1 answer
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Key-Exchange in Steganography

I know there are key-exchange methods in Cryptography. But in case of Secret-key Steganography, what actually stego-key means and how can we use the key and once used how we exchange that with the ...
2 votes
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What are ZK and Fusion algorithms in image steganography

in the literature I have found some algorithms mentioned as ZK and Fusion in image steganography. But I couldn't find any detailed information about these algorithms. Could someone please help to ...
2 votes
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How should we assess the quality of steganography?

I am asking this question instead of extending the discussion of another question (Perfect Steganography). I did try starting a chat room (https://chat.stackexchange.com/rooms/87636/perfect-...
3 votes
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Old French Cipher w/ Text Hidden In Drawing

I'm trying to find a cipher challenge I saw a few years back, it was an old drawing (I think 1800's or earlier) with clouds and stars on it and French text was hidden in the image. Does anyone happen ...