This document discusses steganography and image steganography techniques. It defines steganography as hiding information within other information to avoid detection. Image steganography is described as hiding data in digital images using techniques like least significant bit encoding. The document outlines the LSB algorithm, which replaces the least significant bits of image pixel values with bits of the hidden message. Examples are given to illustrate how short messages can be concealed in an image using this method.
Steganography (US Listeni/ˌstɛ.ɡʌnˈɔː.ɡrʌ.fi/, UK /ˌstɛɡ.ənˈɒɡ.rə.fi/) is the practice of concealing a file, message, image, or video within another file, message, image, or video. The word steganography combines the Greek words steganos (στεγανός), meaning "covered, concealed, or protected", and graphein (γράφειν) meaning "writing"
I presented these slides in the "Privacy Protection" subject, taught by Prof. Josep Domingo-Ferrer in the Master in Computer Security Engineering and Artificial Intelligence.
WANT CODING just visit----------http://bit.ly/image_javaproject
Steganography is the art of hiding the fact that communication is taking place, by hiding information in other information. Many different carrier file formats can be used, but digital images
are the most popular because of their frequency on the Internet. For hiding secret information in
images, there exists a large variety of stenographic techniques some are more complex than others and all of them have respective strong and weak points.
Steganography is the practice of concealing a file, message, image, or video within another file, message, image, or video. The word steganography combines the Greek words steganos meaning "covered, concealed, or protected", and graphein meaning "writing".
The first recorded use of the term was in 1499 by Johannes Trithemius in his Steganographia, a treatise on cryptography and steganography, disguised as a book on magic. Generally, the hidden messages appear to be (or be part of) something else: images, articles, shopping lists, or some other cover text. For example, the hidden message may be in invisible ink between the visible lines of a private letter. Some implementations of steganography that lack a shared secret are forms of security through obscurity, whereas key-dependent steganographic schemes adhere to Kerckhoffs's principle.
The advantage of steganography over cryptography alone is that the intended secret message does not attract attention to itself as an object of scrutiny. Plainly visible encrypted messages—no matter how unbreakable—arouse interest, and may in themselves be incriminating in countries where encryption is illegal.Thus, whereas cryptography is the practice of protecting the contents of a message alone, steganography is concerned with concealing the fact that a secret message is being sent, as well as concealing the contents of the message.
Steganography includes the concealment of information within computer files. In digital steganography, electronic communications may include steganographic coding inside of a transport layer, such as a document file, image file, program or protocol. Media files are ideal for steganographic transmission because of their large size. For example, a sender might start with an innocuous image file and adjust the color of every 100th pixel to correspond to a letter in the alphabet, a change so subtle that someone not specifically looking for it is unlikely to notice it.
A PPT on Stegnography,
It describes the security of information via images by encrypting and decrypting it with the document.
Uses of different models and diagrams.
Project presentation on Image Steganography using MATLAB. Project under Digital Design, Signals and Systems and Communication System.
Tool Used - MATLAB
Steganography (US Listeni/ˌstɛ.ɡʌnˈɔː.ɡrʌ.fi/, UK /ˌstɛɡ.ənˈɒɡ.rə.fi/) is the practice of concealing a file, message, image, or video within another file, message, image, or video. The word steganography combines the Greek words steganos (στεγανός), meaning "covered, concealed, or protected", and graphein (γράφειν) meaning "writing"
I presented these slides in the "Privacy Protection" subject, taught by Prof. Josep Domingo-Ferrer in the Master in Computer Security Engineering and Artificial Intelligence.
WANT CODING just visit----------http://bit.ly/image_javaproject
Steganography is the art of hiding the fact that communication is taking place, by hiding information in other information. Many different carrier file formats can be used, but digital images
are the most popular because of their frequency on the Internet. For hiding secret information in
images, there exists a large variety of stenographic techniques some are more complex than others and all of them have respective strong and weak points.
Steganography is the practice of concealing a file, message, image, or video within another file, message, image, or video. The word steganography combines the Greek words steganos meaning "covered, concealed, or protected", and graphein meaning "writing".
The first recorded use of the term was in 1499 by Johannes Trithemius in his Steganographia, a treatise on cryptography and steganography, disguised as a book on magic. Generally, the hidden messages appear to be (or be part of) something else: images, articles, shopping lists, or some other cover text. For example, the hidden message may be in invisible ink between the visible lines of a private letter. Some implementations of steganography that lack a shared secret are forms of security through obscurity, whereas key-dependent steganographic schemes adhere to Kerckhoffs's principle.
The advantage of steganography over cryptography alone is that the intended secret message does not attract attention to itself as an object of scrutiny. Plainly visible encrypted messages—no matter how unbreakable—arouse interest, and may in themselves be incriminating in countries where encryption is illegal.Thus, whereas cryptography is the practice of protecting the contents of a message alone, steganography is concerned with concealing the fact that a secret message is being sent, as well as concealing the contents of the message.
Steganography includes the concealment of information within computer files. In digital steganography, electronic communications may include steganographic coding inside of a transport layer, such as a document file, image file, program or protocol. Media files are ideal for steganographic transmission because of their large size. For example, a sender might start with an innocuous image file and adjust the color of every 100th pixel to correspond to a letter in the alphabet, a change so subtle that someone not specifically looking for it is unlikely to notice it.
A PPT on Stegnography,
It describes the security of information via images by encrypting and decrypting it with the document.
Uses of different models and diagrams.
Project presentation on Image Steganography using MATLAB. Project under Digital Design, Signals and Systems and Communication System.
Tool Used - MATLAB
This ppt is use full for those who are interested in the area of steganography and try to implements it and add some new features and more security to the steganography
RANDOMIZED STEGANOGRAPHY IN SKIN TONE IMAGESijcseit
Steganography is the technique of hiding a confidential message in an ordinary message and the extraction
of that secret message at its destination. Different carrier file formats can be used in steganography.
Among these carrier file formats, digital images are the most popular. For this work, digital images are
used. Here steganography is done on the skin portion of an image. First skin portion of an image is
detected. Random pixels are selected from that detected region using a pseudo-random number generator.
The bits of the secret message will be embedded on the LSB of these random pixels. An analysis is done to
check the efficiency and robustness of the proposed method. The aim of this work is to show that
steganography done using random pixel selection is less prone to outside attacks.
RANDOMIZED STEGANOGRAPHY IN SKIN TONE IMAGES ijcseit
Steganography is the technique of hiding a confidential message in an ordinary message and the extraction of that secret message at its destination. Different carrier file formats can be used in steganography. Among these carrier file formats, digital images are the most popular. For this work, digital images are used. Here steganography is done on the skin portion of an image. First skin portion of an image is detected. Random pixels are selected from that detected region using a pseudo-random number generator. The bits of the secret message will be embedded on the LSB of these random pixels. An analysis is done to check the efficiency and robustness of the proposed method. The aim of this work is to show that steganography done using random pixel selection is less prone to outside attacks.
Steganography is the technique of hiding a confidential message in an ordinary message and the extraction
of that secret message at its destination. Different carrier file formats can be used in steganography.
Among these carrier file formats, digital images are the most popular. For this work, digital images are
used. Here steganography is done on the skin portion of an image. First skin portion of an image is
detected. Random pixels are selected from that detected region using a pseudo-random number generator.
The bits of the secret message will be embedded on the LSB of these random pixels. An analysis is done to
check the efficiency and robustness of the proposed method. The aim of this work is to show that
steganography done using random pixel selection is less prone to outside attacks.
International Journal of Computational Engineering Research(IJCER)ijceronline
International Journal of Computational Engineering Research(IJCER) is an intentional online Journal in English monthly publishing journal. This Journal publish original research work that contributes significantly to further the scientific knowledge in engineering and Technology.
Steganography is the technique of hiding the fact that communication is taking place,by hiding data in other data. Many different carrier file formats such as image, audio, video, DNA etc can be used, but digital images
are the most popular because of their frequency on the Internet. For hiding secret information in images, there exist a large variety of steganographic techniques. In this paper different steganographic techniques are described.
Steganography is the technique of hiding the fact that communication is taking place,
by hiding data in other data. Many different carrier file formats can be used, but digital images
are the most popular because of their frequency on the Internet. For hiding secret information in
images, there exist a large variety of steganographic techniques. Steganalysis, the detection of this
hidden information, is an inherently difficult problem.In this paper,I am going to cover different
steganographic techniques researched by different researchers.
Keywords — Cryptography, Steganography, LSB, Hash-LSB, RSA Encryption –Decryption
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
The Art Pastor's Guide to Sabbath | Steve ThomasonSteve Thomason
What is the purpose of the Sabbath Law in the Torah. It is interesting to compare how the context of the law shifts from Exodus to Deuteronomy. Who gets to rest, and why?
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
This is a presentation by Dada Robert in a Your Skill Boost masterclass organised by the Excellence Foundation for South Sudan (EFSS) on Saturday, the 25th and Sunday, the 26th of May 2024.
He discussed the concept of quality improvement, emphasizing its applicability to various aspects of life, including personal, project, and program improvements. He defined quality as doing the right thing at the right time in the right way to achieve the best possible results and discussed the concept of the "gap" between what we know and what we do, and how this gap represents the areas we need to improve. He explained the scientific approach to quality improvement, which involves systematic performance analysis, testing and learning, and implementing change ideas. He also highlighted the importance of client focus and a team approach to quality improvement.
How to Create Map Views in the Odoo 17 ERPCeline George
The map views are useful for providing a geographical representation of data. They allow users to visualize and analyze the data in a more intuitive manner.
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
3. Steganography is an art of hiding information inside
information.
The main objective of Steganography is mainly
concerned with the protection of contents of the
hidden information.
Images are ideal for information hiding because of
the large amount of redundant space is created in
the storing of images.
Introduction Introduction
Steganography
Image
Steganography
•LSB algorithm
Types of
Steganography
4. Steganography literally means
“covered writing”
Definition:
It is an art and science of hiding information by
embedding it in some other data.
Goals:
To hide a secret message within an object.
Do it such a way that the presence of message is
not visible.
Introduction
Steganography
Image
Steganography
•LSB algorithm
Types of
Steganography
Steganography
5. Introduction
Steganography
Image
Steganography
Dual layer security
•LSB algorithm
Types of
Steganography
An example of a message containing such a null
cipher is German Spy in World War II:
“Apparently neutral's protest is
thoroughly discounted
And ignored. Isman hard hit.
Blockade issue affects
Pretext for embargo on by products,
ejecting suets and Vegetable oils. ”
Taking the second letter in each word the
following message emerges:
Pershing sails from NY June 1.
7. STEGANOGRAPHY Vs CRYPTOGRAPHY
Cryptography hides the contents of a secret
message from a malicious people, whereas
steganography even conceal the existence of the
message.
In cryptography, the system is broken when the
attacker can read the secret message.
Breaking a steganography system need the
attacker to detect that steganography has been
used.
Introduction
Steganography
Image
Steganography
•LSB algorith
Types of
Steganography
8. Most attractive multimedia objects are
Text steganography
Image steganography
Audio steganography
Introduction
Steganographic
layer
Image
Steganography
•LSB algorithm
Types of
Steganography
Types of steganography
9. Image steganography: Images are used as the message
carriers.Images are the most popular cover objects used for
steganography.
Textual steganography: Text steganography can be
achieved by altering the text formatting, or by altering
certain characteristics of textual elements (e.g.,
characters).
Audio steganography: In audio steganography, secret
message is embedded into digitized audio signal which
result slight altering of binary sequence of the
corresponding audio file.
Introduction
Steganography
Image
Steganography
•LSB algorith
Types of
Steganography
11. Image Steganography requires following elements
to carry out the work:
Cover medium: It is an image that holds secret
message.
The Secret message: it is message to be
transmitted. It can be plain or encrypted text,
images or any other data.
The Stego-key: it is key used to hide the
message (May or may not be used).
Introduction
Steganography
Image
Steganography
•LSB algorithm
Types of
Steganography
13. In Image steganography lossless compression is
generally used.
The lossy compression may not maintain the
original images integrity. But lossless
compression maintains the data exactly.
The compression on lossless image has no effect
on original image.
Introduction
Steganography
Image
Steganography
•LSB algorithm
Types of
Steganography
IMAGE STEGANOGRAPHY CONTIUED….
14. TECHNIQUES FOR USING IMAGE
STEGANOGRAPHY
By using LSB(Least Significant Bit algorithm)
Masking and Filtering
Algorithms and Transformation
Introduction
Steganography
Image
Steganography
•LSB algorithm
Types of
Steganography
15. The LSB algorithm
The most common and popular method of
modern day steganography is to make use of LSB
of picture’s pixel information.
This technique works best when the file is longer
than the message file and if image is grayscale.
When applying LSB techniques to each byte of a
24 bit image,three bits can be encoded into each
pixel.
Introduction
Steganographic
layer
Image
Steganography
•LSB algorithm
Types of
Steganography
16. If the LSB of the pixel value of cover image C(i,j) is
equal to the message bit SM of secret massage to be
embedded, C(i,j) remain unchanged; if not, set the
LSB of C(i, j) to SM.
message embedding Procedure is given below:
S(i,j) = C(i,j) - 1, if LSB(C(i,j)) = 1 and SM = 0
S(i,j) = C(i,j) + 1, if LSB(C(i,j)) = 0 and SM = 1
S(I,j) = C(i,j), if LSB(C(i,j)) = SM
Where LSB(C(i, j)) stands for the LSB of cover image
C(i,j) and “SM” is the next message bit to be
embedded. S(i,j) is the stego image.
Introduction
Steganographic
layer
Image
Steganography
•LSB algorith
Types of
Steganography
17. Data Embedding Algorithm
Step 1: Extract the pixels of the cover image.
Step 2: Extract the characters of the text le.
Step 3: Extract the characters from the Stego key.
Step 4: Choose first pixel and pick characters of
the Stego key and place it in first component of
pixel.
Introduction
Steganographic
layer
Image
Steganography
•LSB algorithm
Types of
Steganography
18. Data Embedding Algorithm
Step 5: Place some terminating symbol to indicate
end of the key. 0 has been used as a terminating
symbol in this algorithm.
Step 6: Insert characters of text le in each rst
component of next pixels by replacing it.
Step 7: Repeat step 6 till all the characters has been
embedded.
Introduction
Steganographic
layer
Image
Steganography
•LSB algorithm
Types of
Steganography
19. Data Extraction Algorithm
Step 1: Extract the pixels of the stego image.
Step 2: Now, start from first pixel and extract stego
key characters from first component of the
pixels. Follow Step3 up to terminating symbol,
otherwise follow step 4.
Step 4: If this extracted key matches with the key
entered by the receiver, then follow Step 5,
otherwise terminate the program.
Introduction
Steganographic
layer
Image
Steganography
•LSB algorithm
Types of
Steganography
20. Data Extraction Algorithm
Step 5: If the key is correct, then go to next pixels
and extract secret message characters from first
component of next pixels. Follow Step 5 till up to
terminating symbol, otherwise follow step 6.
Step 6: Extract secret message.
Introduction
Steganographic
layer
Image
Steganography
•LSB algorithm
Types of
Steganography
21. Example:
We can use images to hide things if we replace
the last bit of every color’s byte with a bit from
the message.
Message A-01000001
Image with 3 pixels
Pixel 1: 11111000 11001001 00000011
Pixel 2: 11111000 11001001 00000011
Pixel 3: 11111000 11001001 00000011
Introduction
Steganographic
layer
Image
Steganography
•LSB algorithm
Types of
Steganography
22. Now we hide our message in the image.
Message: 01000001
Pixel 1: 11111000 11001001 00000010
Pixel 2: 11111000 11001000 00000010
Pixel 3: 11111000 11001001 00000011
New image:
Introduction
Steganography
Image
Steganography
•LSB algorithm
Types of
Steganography
23. CONCLUSION
Hiding a message with steganography methods reduces
the chance of a message being detected.
In and of itself, steganography is not a good solution to
secrecy, but neither is simple substitution and short block
permutation for encryption. But if these methods are
combined, you have much stronger encryption routines.
Like any tool, steganography is neither inherently good
nor evil, it is the manner in which it is used which will
determine whether it is a benefit or a detriment to our
society.
Introduction
Steganographic
layer
Image
Steganography
•LSB algorithm
Types of
Steganography
24. REFERENCES
Implementation of LSB Steganography and its Evaluation for Various
File Formats. Int. J. Advanced Networking and Applications 868
Introduction to image Steganography youtube video.
Cryptography and network security by William Stallings 3rd edition.