Steganography: A Juxtaposition between LSB DCT, DWT (original) (raw)
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international journal for research in applied science and engineering technology ijraset, 2020
Steganography is the practice of concealing the truth that communication is taking place. Intruders can easily attack information within a system if it is readily available. It can be read, modified, misused, and revealed to others. Therefore, the goal is to hide the existence of the secret data. Using steganography techniques, secret data can be concealed within an appropriate multimedia carrier, such as, image, audio, text files; among which digital image is the most widely used carrier format. Different steganography techniques are available, some are more advanced than the others, having strong and weak points respectively. The suitable technique can be selected as per the application requirement. The main objectives of steganography are undetectability, untraceable, robustness, and capacity of secret data. These are the factors that make it different from techniques such as cryptography. This paper analysis the uses of steganography and its techniques. It additionally aims to determine which steganography technique is more suitable for a certain application.
Steganography is defined as study of imperceptible conversation. Steganography typically deals with approaches of hiding presence of communicated information in sort of manner that it stays confidential. It preserves secrecy among two communicating groups. In image steganography, secrecy is attained by means of embedding records into cover image and producing a stego- image. There are distinct kind of steganography strategies each have their strengths and weaknesses. In this paper, we review distinct security and data hiding approaches that are utilized to implement a steganography for instance LSB, ISB, and MLSB etc.
Steganography & It's Application
2017
This paper describes the basic knowledges about steganography and specially the field of image steganography. I have attached the definition of image, steganography and image steganography and different types of it. After that I have given a short passage about the survey of steganography with its related work. And mostly at the end I have added some of my proposed work, consisting block diagram, flowchart and algorithm with a short description with pictorial representation with future scopes.
Steganography Uses and Various Techniques using Digital Images
akram dawood, 2019
In recent years, the rapid growth of information technology and digital communication has become very important to secure information transmission between the sender and receiver. The art of information hiding has received much attention in the recent years as security of information has become a big concern in this internet era. Steganography-the art and science of hiding information into the other information so that the hidden information appears to be nothing to the human eyes has gained much attention. There are many ways to hide information inside an image, audio/video, document etc. But Image Steganography has its own advantages and is most popular among the others. This paper includes the important steganography methods and the main focus is on the review of steganography in digital images steganographic techniques in spatial domain such as least significant bit (LSB), pixel value differencing (PVD). The different aspects on which the steganography method depends are: robustness, capacity, undetectability. Keywords Steganography, Least significant bit (LSB), Pixel value differencing (PVD), Capacity, Stego-image, cover-image 1. Introduction Over the last two decades, the rapid development of internet requires confidential information that needs to be protected from the unauthorized users. This is accomplished through Data hiding. It is a method of hiding secret messages into a cover medium so that an unintended observer will not be aware of the existence of the hidden messages. This is achieved by steganography. The term steganography is retrieved from the Greek words stegos means cover and grafia meaning writing defining it as covered writing.[1]. Steganography is a technology that is used to hide secret information in digital media, thus hiding the fact that secret communication is taking place. By hiding secret information in less suspicious digital media, well-known channels, for example e-mail and social networking sites, are avoided, thereby reducing the risk of information being leaked in transit. Steganography is a technology concerned with ways of embedding a secret message in a cover message also known as a cover object in such a way that the existence of the embedded information is hidden. A secret message can be plaintext, ciphertext, an image, or anything that can be represented as a bit stream. The embedding process is sometimes parameterised by a secret key, called a stego key, and without knowledge of this key it is difficult for an unauthorised party to detect and extract the secret message. Once the cover object has information embedded in it, it is called a stego object. Steganography equation is 'Stego-medium = Cover medium + Secret message + Stego key. Theg eneral model
Insight of Steganography Concealed Message in Images
IJCRT(www.ijcrt.org), 2020
The innovation of technology and having fast internet make information to distribute over the planet easily and economically. this is often made people worry about privacy and works. Steganography may be a technique that forestalls unauthorized users to possess access to big data. The steganography provides methods that users can hide and blend their information with other information that make them difficult to acknowledge by attackers. In this, we review some techniques of steganography spatial and frequency domains. Also, we explain the kinds of steganography host documents. It also can pose serious problems due to it difficult to detect. Network surveillance and monitoring systems won't flag messages or files that contain steganographic data. and that we also see some applications, pros, and cons of steganography.
A short survey on steganography
Steganography is an art of hiding information in innocuous looking cover objects. The main goal of steganography is to avoid drawing intuition about transmission of message. The terms 'Steganography' and 'Steganalysis' are used in information hiding process. Steganography basically deals with hiding information in digital media while steganalysis is the method of detecting the presence of hidden message in it. The term 'Steganography' is often confused with 'Cryptography' which converts message into indecipherable form. Progress made in the field of steganography in terms of using different multimedia files such as images, audio, video, text files as cover objects for hiding information is attracting more people to work in this area.
The paper explore about an overview of steganography, different methods of steganography, its applications and how it is different from cryptography Digital communication has become an essential part of infrastructure. Nowadays, a lot of applications are Internet-based and demand of internet applications requires data to be transmitted in a secure manner. Data transmission in public communication system is not secure because of interception and improper manipulation by eavesdropper. So different techniques like cryptography and steganography are used to secure the communication. Steganography is the scheme of hiding the existence of secret information in the cover file.
A tutorial review on steganography
International Conference …, 2008
The growth of high speed computer networks and that of the Internet, in particular, has increased the ease of Information Communication. Ironically, the cause for the development is also of the apprehension -use of digital formatted data. In comparison with Analog media, Digital media offers several distinct advantages such as high quality, easy editing, high fidelity copying, compression etc. But this type advancement in the field of data communication in other sense has hiked the fear of getting the data snooped at the time of sending it from the sender to the receiver. So, Information Security is becoming an inseparable part of Data Communication. In order to address this Information Security, Steganography plays an important role. Steganography is the art and science of writing hidden messages in such a way that no one apart from the sender and intended recipient even realizes there is a hidden message. This paper is a tutorial review of the steganography techniques appeared in the literature.
—steganography is defined as the study of invisible co mmun ication. Steganography usually deals with the ways of hiding the existence of the communicated data in such a way that it remains confidential. It maintains secrecy between two communicat ing parties. In image steganography, secrecy is achieved by embedding data into cover image and generating a stego-image. There are different types of steganography techniques each have their strengths and weaknesses. In this paper, we review the different security and data hiding techniques that are used to implement a steganography such as LSB, ISB, M LSB etc. ________________________________________________________________________________________________________ I. INTRO DUCTION In today's world, the commun ication is the basic necessity of every growing area. Everyone wants the secrecy and safety of their communicat ing data. In our daily life, we use many secure pathways like internet or telephone for transferring and sharing informat ion, but it's not safe at a certain level. In order to share the information in a concealed manner two techniques cou ld be used. These mechanisms are cryptography and steganography.. In cryptography, the message is modified in an encrypted form with the help o f encryption key which is known to sender and receiver only. The message cannot be accessed by anyone without using the encryption key. However, the transmission of encrypted message may easily arouse attacker's suspicion, and the encrypted message may thus be intercepted, attacked or decrypted violently. In order to overco me the shortcomings of cryptographic techniques, steganography techniques have been developed. Steganography is the art and science of communicat ing in such a way that it hides the existence of the communicat ion. Thus, steganography hides the existence of data so that no one can detect its presence. In steganography the process of hiding in formation content inside any mult imedia content like image , audio, video is referred as a " Embedding ". For increasing the confidentiality of co mmun icating data both the techniques may be combined. The remain ing paper consist of following section : II. Steganography III. Conclusion and Future Work II. STEGANOGRAPHY Steganography is a Greek word wh ich means concealed writing. The word " steganos " means " covered " and " graphical " means " writing ". Thus, steganography is not only the art of hiding data but also hiding the fact of transmission of secret data. Steganography hides the secret data in another file in such a way that only the recipient knows the existence of message. In ancient time, the data was protected by hiding it on the back of wax, writing tables, stomach of rabbits or on the scalp of the slaves. But today's most of the people transmit the data in the form of text, images, video, and audio over the medium. In or der to safely transmission of confidential data, the multimed ia o bject like audio, video, images are used as a cover sources to hide the data A. Types of Steganography : ii. Text Steganography: It consists of hiding informat ion inside the text files. In this method, the secret data is hidden behind every nth letter of every words of text message. Numbers of methods are available for hiding data in text file. These methods are i) Format Based Method; ii) Random and Statistical Method; iii) Linguistics Method. iii. Image Steganography: Hid ing the data by taking the cov er object as image is referred as image steganography. In image steganography pixel intensities are used to hide the data. In digital steganography, images are widely used cover source because there are number of bits presents in digital representation of an image. iv. Audio Steganography: It involves hiding data in audio files. This method hides the data in WAV, AU and MP3 sound files. There are different methods of audio steganography. These methods are i) Low Bit Encoding ii) Phase Coding iii) Spread Spectru m. v. Video Steganography: It is a technique of hiding any kind of files or data into digital video format. In this case video (combination of pictures) is used as carrier for h iding the data. Generally discrete cosine transform (DCT) alter the values (e.g., 8.667 to 9) wh ich is used to hide the data in each of the images in the video, which is unnoticeable by the human eye. H.264, Mp4, MPEG, A VI are the formats used by video steganography. vi. Network or Protocol Steganography: It involves hiding the info rmat ion by taking the network protocol such as TCP, UDP, ICMP, IP etc, as cover object.. In the OSI layer network model there exist covert channels where steganography can be used.
A comprehensive study of steganography: A method of hiding information in other information
Steganography is a art of communicating by hiding a type of information in other information.In the present era, the more attention is given to the art of displaying and sending hidden information because of security purpose.Therefore, different methods have been proposed so far for hiding information in different cover media. In this review paper, we are highlights the various study and research done before.Steganography's primary goal is to hide data within some other data such that the hidden data cannot be detected even if it is being sought.A lot of researchers has done tremendous work in this art but there is lack of a single means to concrete all the information in single study.This paper aims to fulfill that dearth.