An Enhanced HASBE for Cloud Computing Environment

In this era, even sensitive data is stored and shared on the internet using trusted third parties andservice providers. Cloud computing is one of the emerging technologies that is being used widely on thesedays. It makes use of the computing resources such as hardware and software that is delivered over theinternet and provides remote services with user’s data, software and computation. We propose hierarchicalattribute-set-based encryption (HASBE) by extending ciphertext-policy attribute-set-based encryption (ASBE)with a hierarchical structure of users. The proposed scheme not only achieves scalability due to itshierarchical structure, but also inherits flexibility and fine-grained access control in supporting compoundattributes of ASBE There are many encryption schemes that provide security and access control in clouds.This paper presents an encryption scheme called HASBE that provide security, scalable and flexible finegrained access control and its enhancement, a business model for separating the encryption and decryptionservice.