Protecting Personal Health Record System Using Ciphertext Attributes based Encryption

Abstract

Since cloud computing has been assuming an inexorably significant job in real life; the privacy protection in numerous fields has been given increasingly more consideration, particularly, in the field of Personal Health Record (PHR). The traditional ciphertext-policy attribute based encryption (CP-ABE) gives the fine-grained get to control policy for scrambled PHR information, however the entrance policy is likewise sent alongside ciphertext unequivocally. In any case, the entrance policy will uncover the users privacy since it contains an excessive amount of sensitive data of the legitimate information users. Henceforth it is critical to ensure users' privacy by concealing access strategies. In the vast majority of the past plans, despite the fact that the entrance policy is covered up, they face two down to earth issues: (1) these plans don't bolster huge attribute universe, so their common sense in PHR is significantly constrained, and (2) the expense of decryption is particularly high since the entrance policy is installed in ciphertext. To address these issues, we build a CP-ABE plot with proficient decryption, where both the size of open parameters and the expense of decryption are steady. In addition, we additionally show the proposed conspire accomplishes full security in the standard model under static suppositions by utilizing the dual system encryption technique.