Abstract
With rapidly increasing adoption of cloud computing and the advancement of today mobile computing, it is inevitable that mobile devices are used to receive and send the data through the mobile cloud platform. This increases the convenience and flexibility of data access over the cloud computing since data users are able to access the shared data anytime, anywhere via mobile devices. However, using mobile devices in accessing shared data in a cloud where the sensitive data is encrypted is not practical because mobile devices have limited computing resources in dealing with heavy cryptographic operations. In this article, we propose a lightweight collaborative ciphertext policy attribute role-based encryption (LW-C-CP-ARBE) scheme to support a fine-grained and lightweight access control for mobile cloud environment. We apply CP-ABE approach as a core cryptographic access control and introduce a new proxy re-encryption (PRE) protocol to reduce data re-encryption and decryption cost for the mobile users. To this end, the overhead in running the cryptographic operation at the end-user device is small. In addition, we develop secure access policy sharing and re-encryption protocol to enable users having write privilege to update the data and request the proxy to perform data re-encryption. Finally, we present the evaluation and experiments to demonstrate the efficiency and practicality of our system.
Highlights
Data outsourcing service in cloud has been getting much more adoption by many enterprises for their data sharing solution
To the best of our knowledge, most data access control solutions based on CIPHERTEXT POLICY ATTRIBUTE-BASED ENCRYPTION (CP-attribute-based encryption (ABE)) works are technically applicable for non-mobile devices while the existing solutions for mobile cloud are generally not designed for guaranteeing the security when they are implemented in the semi-trusted server
SYSTEM OVERVIEW We propose LW-C-CP-ARBE as the extended version of our previous C-CP-ARBE scheme [10] where the cryptographic construct is based on CP-ABE model [1]
Summary
Data outsourcing service in cloud has been getting much more adoption by many enterprises for their data sharing solution. Its variants called Key-Policy Attribute based Encryption (KP-ABE) and Ciphertext Policy Attribute-based Encryption (CP-ABE) were developed by Goyal et al [11] and Bethencourt et al [1] respectively They have been widely employed by many works as a core construct of a fine-grained access control for outsourced data. To the best of our knowledge, most data access control solutions based on CP-ABE works are technically applicable for non-mobile devices while the existing solutions for mobile cloud are generally not designed for guaranteeing the security when they are implemented in the semi-trusted server. We propose a lightweight collaborative ciphertext policy attribute role-based encryption (LW-C-CP-ARBE) to support secure and fine-grained access control in mobile cloud environment. 1. We propose a flexible, fine-grained, and privacy-aware outsourced data sharing model supporting both read and write access control in mobile cloud environment.
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