In this book implementation and analysis of various symmetric and asymmetric encryption techniques have been discusssed. These techniques have been implemented in MATLAB. Some of the most popular symmetric encryption techniques are DES, AES, 3DES, Blowfish and RC4. Similarly RSA and RSA family are the most popular asymmetric encryption techniques. All these techniques are compared on the basis of memory required for implementation, speed and avalanche effect etc.

Reported in German newspaper by Sean Gallagher in 2012 that, digital steganography hides files in plain sight, concealed in image and media files. When a suspected al-Qaeda member was arrested in Berlin in May of 2011, he was found with a Memory card with a password-protected folder and the files with in it were hidden. But, as the, computer forensics experts from the German Federal Criminal Police (BKA) claim to have eventually uncovered its contents-what appeared to be a pornographic video called " KickAss." Within that video, they discovered 141 separate text files, containing what...