Section 1. Security in network, social IoT and VANET, denial of service attack. Chapter 1. Wireless sensor networks: a technical survey ; Chapter 2. Network security: attacks and control in MANET ; Chapter 3. Cross-layer based intrusion detection and prevention for network ; Chapter 4. Security issues in web services ; Chapter 5. Flawed security of social network of things ; Chapter 6. Artificial intelligence based intrusion detection system to detect flooding attack in Vanets ; Chapter 7. Detection of Botnet based attacks on network: using machine learning techniques ; Chapter 8. Denial-of-service (DOS) attack and Botnet: network analysis, research tactics, and mitigation -- Section 2. Cyber crime and cyber forensics. Chapter 9. Role of cyber security and cyber forensics in India ; Chapter 10. Cyberattacks, cybercrime and cyberterrorism ; Chapter 11. Cyber crime toolkit development ; Chapter 12. On creating digital evidence in IP networks with Nettrack ; Chapter 13. Digital forensics in distributed environment ; Chapter 14. Successful computer forensics analysis on the cyber attack Botnet -- Section 3. Security and privacy in big data analytics and machine learning, biometrics, audio watermarking, and cryptocurrency. Chapter 15. Impact of big data on security ; Chapter 16. The impact of big data analytics and challenges to cyber security ; Chapter 17. Security and privacy challenges in big data environment ; Chapter 18. Impact of big data on security: big data security issues and defense schemes ; Chapter 19. A comparative review of various machine learning approaches for improving the performance of Stego anomaly detection ; Chapter 20. Audio watermarking with reduced number of random samples ; Chapter 21. Bitcoin: digital decentralized cryptocurrency ; Chapter 22. A robust biometrics system using finger knuckle print.