Typically, hackers are ready to hack the confidential
documents for their vested interests. The main challenge is to
construct a secure relation between the secret message and image
quality. To avoid dangerous illegal attacks by the third person, a
scheme is proposed to have a combination of cryptography and
image steganography techniques. This scheme will enable the
security, secret message and image cannot be extracted. The
International Data Encryption Algorithm (IDEA) cryptographic
algorithms and Discrete Cosine Transform (DCT) based
steganography algorithm is chosen for the functionality.
Cryptography is used to encrypt and decrypt the document.
Steganography to hide document inside an image with increasing
payload for the secure transmission of confidential data across the
internet. In this paper we present a single application to hide the
information by the sender, which is so important document and
confidential in the form of files, it will be invisible to unauthorized
person. The results of a suggested scheme with respect to PSNR of
90.06 dB with a payload of 52,400 bytes of information in an
image.
Information Security using Cryptography and Image Steganography
