Cloud computing involves storing data using a third party that ensures that confidential data cannot be accessed even by the cloud itself. Thus, security is one major issue in cloud computing. Recent advancements in exploiting chaotic systems' sensitivity to initial conditions, and their ability to extract strings of random numbers for confusion and diffusion have helped enhance security. They can provide resistance from statistical attack and protection against reconstruction dynamics. However, the concept of chaos for security is still in its emerging stages. This chapter presents how chaos theory can be used for random number generation to further secure data in the cloud. The authors have discussed and compared some popular methods for authentication and encryption of data, images, and videos. The overview of chaos engineering discusses the discipline of experimenting on multi-server systems to ensure its ability to tackle glitches.