As the development and deployment of Artificial General Intelligence (AGI) continue at an unparalleled step, associated cybersecurity challenges and risks have become important topics. AGI is the most advanced form of artificial intelligence and has significant social benefits but also increases some security issues. This chapter explores the different aspects of AGI security, starts with an introductory section, and provides a comprehensive background to AGI, highlighting its significance in society and the quick advancements in its fields. Subsequently, it discusses the ever-evolving world of cybersecurity and how it relates to AGI, also addressing the cybersecurity threats and challenges. Furthermore, this chapter highlights the risks associated with AGI security, emphasizing the consequence of an insecure AGI system. Analysis includes ethical considerations that address ethical issues concerning AGI security and the accountability of developers. For secure AGI development, some best practices are outlined, with a focus on transparency and accountability. In this fast-changing field, it is crucial to understand the security problems with AGI. This chapter provides a comprehensive exploration of the ethical, technical, and security issues that will shape the future of AGI.