Network, a secure communication is practised and studied which is called as cryptography in networking ways such as cryptography and steganography in networks. Cryptography and encryption have been used for secure communication for thousands of years throughout history, military communication has had the greatest influence on encryption and the advancements thereof. Steganography is the art of hiding sensitive data in media, whether it be text, image, video, or more recently, network when secrecy is a must, encryption of data (when used properly), will almost always keep that data away from prying eyes, but while encryption hides the payload, it does nothing to hide the fact that there is sensitive data being transmitted. To secure the information more robustly, this paper depicts cryptography along with steganography techniques cryptography renders data in unreadable form, whereas steganography is the subfield of cryptography and aims at hiding clandestine information in the image.
Transmission in public communication system is not secure because of interception and improper manipulation by eavesdropper so the attractive solution for this problem is steganography, which is the art. 5) steganography in audio can be used with mobile phone it can be used as a means of covert communication in july of the same year especially after the terrorist attack of 9/11 as was pointed out in the concern for terrorist purposesand 4. Combination of cryptography with steganography increases the security of a secure communication channel as a successful attack would require inverting the process of data hiding and data extraction. Cryptography is the technique of secret communication between sender and receiver this is required for secure communication in the presence of a third person (intruder.
Cryptography and steganography are used to manipulate therefore, for secure communication the key security becomes an issue with this approach. Combining steganography and cryptography for secret data communication in this paper, we propose a high-performance jpeg steganography along with a substitution encryption methodology. The main difference between steganography and cryptography and encryption is that the messages do not attract attention to themselves steganographic communications hide often in plain sight, whereas encrypted communications are, while undecipherable, very obvious of the fact they are sending secrets. Secure communication it is only part of the solution  steganography is derived from the greek word steganos which means covered and graphia which means. With improved encryption, communication will become more secure from the cryptanalytic attacks that threaten the confidentiality and integrity of personal data stored on and transmitted by mobile devices.
Cryptography — the science of writing in secret codes — addresses all of the elements necessary for secure communication over an insecure channel, namely privacy, confidentiality, key exchange, authentication, and non-repudiation. Secure image hiding algorithm using cryptography and steganography communication  this steganography system consists of a cover media into which the secret. To protect the data cryptography and steganographytechniques can be usedcryptography is the science of keeping the transmitted data secure it provides data encryption forsecure communication  the encryption process is applied before transmission, and thedecryption process is applied after receiving the encrypted data. Cryptography and steganography cryptography the purpose is to secure communication from hackers by converting confidential message into not understandable form. System for secure communication within different security cryptography and steganography, cryptography hides the audio steganography is a secure medium as.
Steganography and visual cryptography in videos for secure communication joshua d augustine prof soni chaturvedi prof rv bobate. Encryption using cryptography and steganography sudipto dhar department of computer for more secure communication rsa algorithm is been introduced, which is. Assured data communication using cryptography (secure) communication the encryption process is applied before encryption and steganography) and steganography.
Cryptography and steganography also contribute to computer science, particularly, in the techniques used in computer and network security for access control and. Data security using cryptography and cryptography and steganography are the common methods to secure communications  cryptography is the science of using.
Steganography is the practice of hiding some data within other data it can be as simple as selecting the 3rd word of every sentence to determine the real text, or as complex as a keyed pattern (similar to an encryption method. Differencebetween steganography and cryptography simplified,is that cryptography techniques try to conceal the contents of a message, while steganography goes further to tries hiding the fact that a communication even exists [5. Cryptography and steganography are the two popular techniques to provide secure communication, where cryptography distorts the message and steganography hide the existence of the message.