Advances in cyber security : second international conference ACeS 2020 Penang Malaysia December 8 9 2020 : revised selected papers Internet of Things Industry 4.0 and Blockchain and Cryptology Digital Forensics and Surveillance Botnet and Malware DDoS and Intrusion Detection Prevention Ambient Cloud and Edge Computing Wireless and Cellular Communication Governance Social Media Mobile and Web Data Privacy Data Policy and Fake News. This book presents refereed proceedings of the Second International Conference on Advances in Cyber Security ACeS 2020 held in Penang Malaysia in September 2020. Due to the COVID 19 pandemic the conference was held online. The 46 full papers and 1 short paper were carefully reviewed and selected from 132 submissions. The papers are organized in topical sections on internet of things industry 4.0 and blockchain and cryptology; digital forensics and surveillance botnet and malware and intrusion detection prevention; ambient cloud and edge computing wireless and cellular communication; governance social media mobile and web data privacy data policy and fake news