ACAFD: Secure and Scalable Access Control with Assured File Deletion for Outsourced Data in Cloud

Abstract

Cloud storage has emerged as a popular paradigm to outsource data to third party and share it with the collaborators. Wh ile this new paradigm enables users to outsource their sensitive data and reduces data management costs, it brings forth the new challenges to the user to keep their data secure. Data storage security and access control in the cloud is one of the challenging ongoing research works to alleviate the data leakage proble m from unauthorized users. Existing solutions that use pure cryptographic tech niques suffers from heavy computation work with respect to key management and key distribution. Attribute based encryption is an alternative soluti on that map the user access structure with the data file attributes to control the data access. However any of the existing schemes doesn't address the access con trol with assured deletion of the files upon revocation of user access. This arti cle addresses this open issue using a trusted authority that manages the access c ontrol list and takes care of key management and key distribution and file deleti on upon user revocation. The prototype of model has been presented and analyzed the security features over existing scheme.