Image Steganography with Cryptography using Multiple Key Patterns

Image Steganography is the art of hiding information into an innocent image. In this paper a new Steganography method is presented. First, the message is converted into ciphertext using a strong encryption algorithm with the help of secret key. In this proposed Steganography system, sender and receiver share multiple stego keys. Among the multiple stego keys, any one of the stego key is used for steganography. The information about the stego key (key number) is embedded in the first pixels of the original image. Based on the pattern given in the stego key, ciphertext is embedded in the pixels of original image. The receiver first extracts the key number and then obtains the stego key from the database. Using the pattern given in the stego key, ciphertext is retrieved from the pixels of Stego image. The ciphertext is decrypted using the secret key. Thus, it is difficult to recognize that some information is embedded in the cover image, called Stego image, which is same as original image. The proposed system is simple and robust against the attacks