Image Steganography Based on Transform Domain, Blowfish and AES for second level security
Keywords:
Steganography, Cryptography, DCT, PSNR, MSE, Bolwfish, AESAbstract
Steganography is technique for secret communication. It hides the existence of the communication between parties. So viewer cannot detect the existence of the message and also not detect the communication channel. So attacker cannot modify and see the secret information. In image steganography, secrecy is accomplished by hide the secret message in cover image using steganography techniques. There are different types of steganography techniques each have their merits and demerits. Using Steganography techniques on cover image we can improve the security and robustness. For improving second level security we are using cryptography. Cryptography is used to convert the secret message in cipher text means unreadable form of message. Cryptography introduces many algorithms. This algorithm converts the secret message in cipher text. In our proposed method we are using Blowfish and AES algorithm for converting the message in cipher text and then hide this cipher text in cover image using DCT steganography technique. Using this combine technique we can get the stego-image. Here using this proposed method we can get the security and robustness in terms of message when we retrieve the message from the stego-image.
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