Securing Information Using Cryptography and Steganography Technique

Present day’s communication became the one of the major criteria for a human being. While communication the information should be send in such a way that the third part or an unauthorized user should not be able to know what the parties are communicating. For this, Internet is the source of communication. In Internet the data will be transferred in covert channel. Here it will be difficult to provide security for the channel, so the security is provided for the information than the channel. Now the task is to provide the security to the information. Cryptography and steganography are the techniques used to convert the secret information into an unreadable format and this data can be embedded into an image respectively. By using only cryptography the intruder can get back the original message if the key is known, to avoid this, by introducing Steganography over cryptography the secret message cannot be straight forwardly decrypted because, the data is embedding into a cover image, Nemours techniques are available in which Least Significant Bit insertion is one of the best techniques because it produces less noise in stego-image when compared to other techniques. Using Diffie Hellman algorithm the data is encrypted.