Secure Multi Authority Cloud Storage Based on CP- ABE and Data Access Control

now a days, plenty of users area unit storing their data’s in cloud, as a result of it provides storage flexibility. However the most drawbacks in cloud are information security. Cipher text-Policy Attribute-based cryptography (CP-ABE) is thought to be one among the foremost appropriate technologies for information access management in cloud storage; as a result of it offers information house owners a lot of direct management on access policies. During this work to propose an information access management for multiauthority for substantiating the integrity of AN un-trusted and outsourced storage by third party auditor. Additionally, this project proposes methodology primarily based on probabilistic question and periodic verification for up the performance of audit services. It ensures potency of security by protective from unauthorized users. These experimental results not solely validate the effectiveness of those approaches; however conjointly show our audit system verifies the integrity with lower computation overhead and requiring less additional storage for audit data.