Enabling Cloud Storage Auditing with Verifiable Outsourcing of Key Updates

 Enabling Cloud Storage Auditing with Verifiable Outsourcing of Key Updates

 Key-exposure resistance has always been an important issue for in-depth cyber defence in many security applications. Recently, how to deal with the key exposure problem in the settings of cloud storage auditing has been proposed and studied. To address the challenge, existing solutions all require the client to update his secret keys in every time period, which may inevitably bring in new local burdens to the client, especially those with limited computation resources such as mobile phones.