Secure and Secret Transmission of Messages Using the DCT Technique of Steganography (original) (raw)
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A steganographic method based on DCT and new quantization technique
2012 22nd International Conference on Computer Theory and Applications (ICCTA), 2012
In this paper, an efficient data hiding technique based on the discrete cosine transform (DCT) of image is proposed. In this technique, the DCT coefficient is quantized using a predefined mathematical operation then the secret bits are embedded in all frequency component of the quantized DCT coefficient using least significant-bit (LSB) to enable a large message capacity. A comparison between the proposed method and other existing methods is introduced. The results demonstrated that the performance of the proposed method is satisfied compared to them.
A Secure Image Steganography Using Advanced Encryption Standard and Discrete Cosine Transform
Journal of Information Security, 2019
Cryptography and Steganography are two prominent techniques to obtain secure communication over the shared media like the Internet. Steganogra-phy is slightly ahead of cryptography because of its stealthy characteristics. In this paper, a new method has been proposed which combines cryptography and steganography to ensure even more secure communication. The Advanced Encryption Standard (AES) in spatial domain of the carrier/cover image and Least Significant Bit (LSB) replacement in the transformed domain of the same image has been used after performing a Discrete Cosine Transform (DCT) on the pixels. An additional layer of security has been introduced by applying XOR operation on the AES encrypted message with the pixel values of the carrier image. The Peak Signal to Noise Ratio (PSNR) of the proposed algorithm is better than most of the similar algorithms. With better PSNR, the proposed method depicts a three layer of security of the information and error free decryption.
Concealing Encrypted Messages using DCT in JPEG Images
Steganography is an important area of research in recent years involving a number of applications. It is the science of embedding information into the cover image viz., text, video, and image (payload) without causing statistically significant modification to the cover image. The modern secure image steganography presents a challenging task of transferring the embedded information to the destination without being detected. In this paper we present an image based steganography that combines Discrete Cosine Transform (DCT), and compression techniques with LSB techniques on raw images to enhance the security of the payload. Initially the coverimage is transformed from spatial domain to the frequency domain using DCT. The image is then quantized. and LSB technique is used to insert in pixels specified according to a range.
A proposed Technique for Information Hiding Based on DCT
International Journal of Advancements in Computing Technology, 2010
The aim of this work is to design an algorithm which combines between steganography and cryptography that can hide a text in an image in a way that prevents, as much as possible, any suspicion of the hidden text The proposed system depends upon preparing the image data for the next step (DCT Quantization) through steganographic process and using two levels of security: the RSA algorithm and the digital signature, then storing the image in a JPEG format. In this case, the secret message will be looked as plaintext with digital signature while the cover is a coloured image. Then, the results of the algorithm are submitted to many criteria in order to be evaluated that prove the sufficiency of the algorithm and its activity. Thus, the proposed algorithm for this research can be divided into two main parts: hiding the text of the sender, and extracting it by the receiver. Moreover, part can be divided into many procedures done by the program Delphi 5.
An Improved DCT based Steganography Technique
International Journal of Computer Applications, 2014
In this paper, a steganographic technique for hiding secret data in image file formats is proposed. This technique uses the Quantized DCT coefficients for hiding the secret information. The proposed steganographic method can provide a high information hiding capacity and successfully increase the security.
Secure Image Steganography Algorithm Based on DCT with OTP Encryption
Rapid development of Internet makes transactions message even easier and faster. The main problem in the transactions message is security, especially if the message is private and secret. To secure these messages is usually done with steganography or cryptography. Steganography is a way to hide messages into other digital content such as images, video or audio so it does not seem nondescript from the outside. While cryptography is a technique to encrypt messages so that messages can not be read directly. In this paper have proposed combination of steganography using discrete cosine transform (DCT) and cryptography using the one-time pad or vernam cipher implemented on a digital image. The measurement method used to determine the quality of stego image is the peak signal to noise ratio (PSNR) and normalized cross Correlation (NCC) to measure the quality of the extraction of the decrypted message. Of steganography and encryption methods proposed obtained satisfactory results with PSNR and NCC high and resistant to JPEG compression and median filter.
Network steganography with DCT approach
International journal of applied research, 2016
In this paper, the authors propose a new steganography algorithm to hide data inside image using steganography technique. The proposed algorithm uses binary codes and pixels inside an image. The zipped file is used before it is converted to binary codes to maximize the storage of data inside the image. By applying the proposed algorithm, a system called Steganography Imaging System (SIS) is developed. The system is then tested to see the viability of the proposed algorithm. Various sizes of data are stored inside the images and the PSNR (Peak signal-to-noise ratio) is also captured for each of the images tested. Based on the PSNR value of each images, the stego image has a higher PSNR value. This method also uses 3-dimentional discrete cosine transformation scheme, along with 2-dimentional discrete cosine transformation for sending secret data over network. The paper will not consider network protocol facility by assuming data may be transmitted from one place to another through computer network.
The aim of this work is to design an algorithm which combines between steganography and cryptography that can hide a text in an image in a way that prevents, as much as possible, any suspicion of the hidden text The proposed system depends upon preparing the image data for the next step (DCT Quantization) through steganographic process and using two levels of security: the RSA algorithm and the digital signature, then storing the image in a JPEG format. In this case, the secret message will be looked as plaintext with digital signature while the cover is a coloured image. Then, the results of the algorithm are submitted to many criteria in order to be evaluated that prove the sufficiency of the algorithm and its activity. Thus, the proposed algorithm for this research can be divided into two main parts: hiding the text of the sender, and extracting it by the receiver. Moreover, part can be divided into many procedures done by the program Delphi 5.
A Novel Technique for Image Steganography Techniques Based on LSB and DCT Coefficients
IJSRD, 2014
Steganography is used to carry information from source to destination using public channel in such a way that only sender and intended receiver know that there is hidden message. This paper represents image steganography method that is based on LSB and DCT coefficients that provide randomized bits embedding inside the cover image. Firstly the Discrete Cosine Transform (DCT) apply on the cover image and then hiding the secret information in LSB of the cover image in random locations based on threshold value. Using DCT Coefficients value, Find the randomized pixel locations for hiding secret information and increase the security of system.
Survey:Image Steganography Using DCT Technique
Steganography is defined as the study of invisible communication. 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 communicating 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. Using Steganography techniques on Stego image we can improve the security. For improving second level security we can also apply blowfish algorithm on stego image. so that the result in improvement of security in terms of execution can be achieved.