Enhancement of Key Based Encryption Technique in Delegation System

Cloud computing plays a major role in technology. Data moved to cloud due to larger size. Data in cloud is becoming a high risk. Data stored in cloud start from virtual machine to share resources. Enhancement of key based encryption technique in delegation system provide high security to users therefore making to minimize risks. Data stored in cloud using CP-ABE under certain access policies. One time MAC is combined with symmetric encryption to develop KEM/DEM model for hybrid encryption ABE and again they can be combined with Diffie Helman key exchange method to produce enhanced security.