This document discusses emerging challenges in cyber security. It defines the digital battlefield as the interconnected systems and devices vulnerable to cyber threats. New challenges arise as technology advances, such as mobile threats, sophisticated phishing, ransomware, and security issues with the Internet of Things. Cyber attacks are also growing more advanced through malware, social engineering, and zero-day exploits. Social engineering techniques are a rising challenge, using psychological manipulation. There is also a significant skills gap in cybersecurity professionals. Threat intelligence and artificial intelligence can help address some of these challenges and enhance cyber security.