Key Aggregate Policies for Secure Data Sharing in Cloud Storage

2 ABSTRACT:Sensitive information modified should be firmly done to verify the integrity of cloud information, to stop it from being disclosed to or modified by unauthorized parties. Many enterprises supply information storage to the cloud mere a member of a company or information owner can merely share information with completely different members or users with confidentiality. The new public key aggregate policies that prove constant-size ciphertext wherever mere ciphertext unit labeled with sets of attributes and private keys unit associated with structures that management that user is able to decrypt. In several words, the key holder can unleash a constant- size aggregate key for versatile preferences of ciphertext set in cloud storage, but the other encrypted files outside the set keep secret to boot to authentication and privacy preservation this theme tries to satisfy all completely different security wants with key management and achieves higher quantifiability once the quantity of access levels can increase.