Certainty Based Privacy Service Mechanism based on Key Policy Behavioral Based Encryption

Abstract Data storage on cloud is provided by the service provider. Storage of this data on un-trusted storage makes secure data sharing a challenging issue. Confidentiality of the data on this unknown environment can be achieved via various access control & encryption mechanism. Conventional encryption standards & techniques will only provide the basic things of security which can be breached. To achieve fine grained access control & effective data access control policies attribute based encryption is well defined standard [1]. There are various encryption algorithms available like AES, 3DES, blowfish etc. which will also provide the encryption based security but in a defined manner [2]. It is a burdensome of user to deal with their complex processes. For further improvements in existing methodology of security this work focuses on attribute based encryption with trust value. This work describe the basic utility of applying attribute based encryption (ABE) for data sharing on untrusted storage & servers. According to the specified problem the domain cloud security this work gives the solution to the mentioned security issues through CBPSM protocol stack in two steps. In first step, the user focuses on the revocation methodologies based on ABE. It gives the access control mechanism according to the user access historical details.