Improvisation of Security aspect of Steganographic System by applying RSA Algorithm

Abstract

Abstract-The applications accessing multimedia systems and content over the internet have grown extremely in the earlier few years. Moreover, several end users or intruders can simply use tools to synthesize and modify valuable information. The safety of information over unsafe communication channel has constantly been a primary concern in the consideration of researchers. It became one of the most important problems for information technology and essential to safeguard this valuable information during transmission. It is also important to determine where and how such a multimedia file is confidential. Thus, a need exists for emerging technology that helps to defend the integrity of information and protected the intellectual property privileges of owners. Various approaches are coming up to safeguard the data from unauthorized person. Steganography and Cryptography are two different techniques for security data over communication network. The primary purpose of Cryptography is to create message concept unintelligible or ciphertext might produce suspicious in the mind of opponents. On the other hand, Steganography implant secrete message in to a cover media and hides its existence. As a normal practice, data embedding is employed in communication, image, text or multimedia contents for the purpose of copyright, authentication and digital signature etc.Both techniques provides the sufficient degree of security but are vulnerable to intruder's attacks when used over unsecure communication channel. Attempt to combines the two techniques i.e. Cryptography and Steganography, did results in security improvement. The existing steganographic algorithms primarily focus on embedding approach with less attention to preprocessing of data which offer flexibility, robustness and high security level. Our proposed model is based on Public key cryptosystem or RSA algorithms in which RSA algorithm is used for message encryption in encoding function and the resultant encrypted image is hidden into cover image employing Least Significant Bit (LSB) embedding method.

A systematic review of non-functional requirements mapping into architectural styles

“…c. The platform layer: to reduce the deployment burden directly on virtual machines, the platform layer consists of software frameworks and operating systems. d. The application layer: this layer is constructed on top of the actual cloud applications [53]. Examples include Google Maps, YouTube, and Facebook.…”

Implementation of image file security using the advanced encryption standard method

“…However, confidential image files in a storage medium (hard disks and memory cards) and image files transmitted on a network may cause eavesdropping, modification, or fabrication by certain third parties (crackers). The purpose of the cracker is to find out crucial information hidden in an image, or the cracker wants to break into confidential data behind the characteristics possessed by the image file [1]- [4].…”

“…Cryptography can be divided into symmetric key cryptography and asymmetric key cryptography. In symmetric key cryptography, the key for the encryption process is the same as the key for the decryption process [1], [7], [8]. So, in this case, the sender and recipient of the message have already shared the key before exchanging messages with each other.…”