This book gathers the peer-reviewed proceedings of the International Ethical Hacking Conference, eHaCON 2019, the second international conference of its kind, which was held in Kolkata, India, in August 2019. Bringing together the most outstanding research papers presented at the conference, the book shares new findings on computer network attacks and defenses, commercial security solutions, and hands-on, real-world security lessons learned. The respective sections include network security, ethical hacking, cryptography, digital forensics, cloud security, information security, mobile communications security, and cyber security.