SECURELY DATA SHARING WITH TIME SERVER CP-ABE IN CLOUD COMPUTING USING KEY MANAGEMENT PROTOCOL

Abstract

Ciphertext-policy attribute-based coding (CP-ABE) may be a promising cryptological technique for fine-grained
access management of outsourced knowledge within the cloud. However, some drawbacks of key management hinder the
recognition of its application. One downside in imperative want of resolution is that the key written agreement drawback. we
have a tendency to indicate that front-end devices of shoppers like sensible phones typically have restricted privacy
protection, therefore if personal keys are entirely controlled by them, shoppers risk key exposure that's hardly noticed
however inherently existed in a previous analysis. moreover, monumental consumer decoding overhead limits the sensible
use of ABE. during this work, we have a tendency to propose a cooperative key management protocol in CP-ABE (CKM-CPABE). Our construction realizes distributed generation, issue, and storage of personal keys while not adding any additional
infrastructure. A fine-grained and immediate attribute revocation is provided for a key update. The projected cooperative
mechanism effectively solves not solely key written agreement drawback however conjointly key exposure. Meanwhile, it
helps markedly scale back consumer decoding overhead. A comparison with different representative CP-ABE themes
demonstrates that our scheme has somewhat higher performance in terms of cloud-based outsourced knowledge sharing on
mobile devices. Finally, we offer proof of security for the projected protocol.