Cryptography and Steganography: New Approach

Abstract

Digital communication witnesses a noticeable and continuous development in many applications in the Internet. Hence, secure communication sessions must be provided. The security of data transmitted across a global network has turned into a key factor on the network performance measures. So, the confidentiality and the integrity of data are needed to prevent eavesdroppers from accessing and using transmitted data. Steganography and Cryptography are two important techniques that are used to provide network security. In this paper, we survey a number of methods combining cryptography and steganography techniques in one system. Moreover, we present some differences between cryptography and steganography. The aim of this paper is to develop a new approach to hiding a secret information in an image or audio or video, by taking advantage of benefits of combining cryptography and steganography. In this method first, the message is encrypted by using AES algorithm and hashed the key using SHA-2 to prevent from attacks. After that, we performed some modifications on LSB algorithm by adding a key to make hiding process non sequential. Results achieved indicate that our proposed method is encouraging in terms of robustness and security.

Signature Text,Image and Audio Hiding in a Color Image using Steganography and Cryptography

“…In paper [7], cryptography incorporated steganography is imply (CICS) to supply a highly secure steganography algorithm for the files of the multiple formats, The performance analysis of the tactic and therefore the measurement of the parameters like the PSNR and therefore the SSIM are done to confirm the efficiency of the proffered method. A digital signature is constructed upon the concept of public key encryption.…”

Crypto-Steganographic LSB-based System for AES-Encrypted Data

“…Advances in technology have allowed steganography (meaning hidden writing) to occupy a certain position in the field of information encoding and its concealment. Such a trend has emerged in the field of information security as computer steganography (the secret message is hidden in other than original media such as Text, Image, video and audio form) [1][2][3][4]. The general idea of hiding some information in digital content has a wider class of applications that go beyond Steganography.…”

“…Unlike information hiding and digital watermarking, the main goal of steganography is to communicate securely in a completely undetectable manner. A steganography task is to hide a certain message in another container file, so that the presence of the hidden message cannot be seen [2,3]. As containers, digital images, audio and video files are commonly used [2,5,7].…”

“…An overview of the existing methods of solving the problem [2,3,5], showed that the most promising in terms of information capacity are containers in the form of image files in BMP format. Methods that use image files are the most advantageous and promising, since they practically do not limit the amount of data transferred, it all depends on the container selected.…”

“…In the general case, it is advisable to use the word "message" because the message can be plaintext, cipher text, image, spreadsheet, audio or even video data [2]. Basically, any form of data that can be represented in a bitstream can be hidden through steganography [3,4].…”