Chapter 1. Implementation of a reversible watermarking technique for medical images -- Chapter 2. Multimedia data security with recent trends and technologies: a Survey -- Chapter 3. On the implementation of a fragile medical image watermarking technique using saliency and phase congruency -- Chapter 4. Exploring recent advances in digital video steganography and future scope -- Chapter 5. Reversible data hiding: an active forensic framework for digital images -- Chapter 6. Commutative watermarking-encryption of multimedia data based on histograms -- Chapter 7. De-noising of binary image using accelerated local median-filtering approach -- Chapter 8. Analysis of human gait for designing a recognition and classification system -- Chapter 9. Implementation of a hybrid classification method for diabetes -- Chapter 10. Melanoma identification using MLP with parameter selected by metaheuristic algorithms.