AN IMPLEMENTATION OF SECURE GROUP SHARING FRAMEWORK WITH OUTSOURCED REVOCATION IN CLOUD COMPUTING

Abstract

Cloud computing allows users to simply store their information and easily share information with others. Because of the protection threats in associate degree untrusted cloud, users area unit suggested to cipher verification data, like signatures, on their information to shield the integrity. Several mechanisms are planned to permit a public friend to with efficiency audit cloud information integrity while not receiving the whole information from the cloud. However, to the simplest of our information, none of them has thought of regarding the potency of public verification on multi-owner information. User revocation is one in all the most important security issue in teams. Throughout user revocation shared information block signed by revoked user must transfer and re-sign by existing user . To create the method economical and secured the info integrity is verified in public, for this each user must cipher their signature on every block. For security reason if a user revoked from the cluster and also the remaining user within the cluster has got to resign the signature on all blocks. So as to over these drawbacks we have a tendency to planned a unique design of public auditing mechanism for maintaining the integrity of shared information by means that of economical user revocation in mind. By means that of keeping a public auditing, a proxy re-signature handles resigning rather than doing by each existing user within the cluster. Public verifier examines integrity while not retrieving the whole data from the cloud