Abstract

Abstract:Cloudstorage is an appositeness of clouds that absolve organizations fromestablishing data storage systems. However, cloud storage enhances the securityconcerns. In case of groups-shared data, the data face both issues likecloud-specific and decorous insider threats. Securely data sharing among agroup that counters insider threats of apropos up to now malicious users is an important researchissue. Cloud computing has been rapidly changing modern computingenvironment. The problem of how to keep the confidentiality of user dataagainst malicious entities including a CSP (cloud service provider) has beenrecognized as a significant issue. This problem becomes even more complicatedif a data is shared among multiple users.  In addition to existing systemhere we introducing the new factor for data security on cloud storage and fordata sharing is figure impression i.e. this is  the alternative for mobile if mobile OTP fails then it works.Using 3DES(DataEncryption Standard) algorithm we provide high level of security for securelydata transmission  on cloud storage system.The 3 Factor Secure Data Sharing methodologies include 3 Factor Secure accessto sharing mechanism. Whenever a group membership is changed, only a newcondition value is distributed to the users via cloud server. As a result, theoverhead of each user becomes significantly reduced at each membership change.As result this system is provide high level of security for data sharing andstorage on cloud.

Keywords:Three factor, factor revocability, cloudsecurity using 3 DES, cloud storage