This book represents cloud computing as an interesting database carrier that is far away from cumbersome physical connections and is mostly virtual. It can be accessed from anywhere and anytime, and also removes various intermediaries. It describes the recent development with respect to techniques, backups, AI platforms, cloud security, etc. IoT security challenges and risks. It also describes the Recent development with future ideas. The book defines the recommended procedures. Quantum cryptography with respect to the defending and quantum key cryptography distribution. It also describes the recent development with future ideas. It describes the application and security issues, and challenges. It defines the recommended procedures. DNA is the lifeline with respect to steganography and cryptography. It also describes the Literature review, the problem statement, and the DNA lifeline. The book defines some of the implementation procedures, Elliptic Curve cryptography with respect to the recent development.