Enhancing Data Security in Cloud Storage Auditing with Key Update

: In case of cyber defense several security applications Key-exposure resistance has all the time a very important issue. In recent times, the way to handle the key exposure problem in the settings of cloud storage auditing has been proposed and studied. To deal with this problem existing solutions all need the client to update his secret keys in each time period , which may inevitably bring in new local burdens to the client particularly those with limited computation resources, like mobile phones. In this paper, we focus on how to make the key updates as transparent as possible for the client and plan a new paradigm known as enabling cloud storage auditing with verifiable outsourcing of key updates. In this paradigm, key updates can be outsourced to some authorized party, and therefore the key-update burden on the client will be kept minimal.