Big data security Frontmatter Preface Contents List of Contributors 1. Introduction Gupta Shibakali Banerjee Indradip Bhattacharyya Siddhartha 2. Digital identity protection using blockchain for academic qualification certificates Mrsic Leo Fijacko Goran Balkovic Mislav 3. Anomaly detection in cloud big database metric Chowdhury Souvik Gupta Shibakali 4. Use of big data in hacking and social engineering Gupta Shibakali Mukherjee Ayan 5. Steganography the widely used name for data hiding Mukherjee Srilekha Sanyal Goutam 6. Big data security issues with challenges and solutions Koley Santanu 7. Conclusions Gupta Shibakali Banerjee Indradip Bhattacharyya Siddhartha