Extra Security Enhancement of Cryptography and Steganography for Digital Message Hiding
Pye Pye Aung · 2013
Cryptography and Steganography are two popular ways of sending / hiding information in a secret way. Cryptography hides the existence of the message and Steganography distorts the message itself. There are many cryptography techniques available; among them AES is one of the most powerful techniques. In Steganography there are various techniques in different domains like spatial domain, frequency domain etc., to hide the message. But in frequency domain, it is very difficult to detect hidden message and for that we can use various transformations like DCT, FFT and Wavelets etc. In this case study, it is developing a system where it is developed a new technique in which Cryptography and Steganography are used as combined part along with developed enhanced security technique. In Cryptography, AES algorithm is used to encrypt a message and to generate the cipher text. In Stegnography, a part of the position points of the digit (1) from the cipher text is hidden in DCT of an image and is used to generate two secret keys which make this system highly secured. This kind of system is to be introduced in applications such as transferring secret data that can be authentication of various fields. This system ensures a secure data transferring option between the source and destination stations.