EFFICIENT KEY MANAGEMENT PROTOCOL FOR DATA SHARING IN CLOUD

Abstract

Ciphertext policy attribute-based cryptography (CP-ABE) is additionally a promising science technique for finegrained access management of outsourced info at intervals the cloud. However, some drawbacks of key management hinder
the recognition of its application. One recoil in imperative want of resolution is that the key legal instrument draw back. we
have got AN inclination to purpose that front-end devices of shoppers like wise phones sometimes have restricted privacy
protection, therefore if personal keys unit of measurement entirely management by them, shoppers risk key exposure that's
hardly detected however inherently existed in previous analysis. moreover, monumental consumer cryptography overhead
limits the wise use of ABE. throughout this work, we have got AN inclination to propose a cooperative key management
protocol in CP-ABE (CKM-CP-ABE). Our construction realizes distributed generation, issue and storage of personal keys
whereas not adding any additional infrastructure. A fine-grained and immediate attribute revocation is provided for key
update. The projected cooperative mechanism effectively solves not entirely key legal instrument draw back however put
together key exposure. Meanwhile, it helps markedly shrink consumer cryptography overhead. A comparison with utterly
totally different representative CP-ABE themes demonstrates that our theme has somewhat higher performance in terms of
cloud-based outsourced info sharing on mobile devices. Finally, we offer proof of security for the projected protocol.