ABSTRACT
Cloud computing, which provides adequate storage and computation capability, has been a prevalent information infrastructure. Secure data sharing is a basic demand when data was outsourced to a cloud server. Attribute-based proxy re-encryption has been a promising approach that allows secure encrypted data sharing on clouds. With attribute-based proxy re-encryption, a delegator can designate a set of shared users through issuing a re-encryption key which will be used by the cloud server to transform the delegator’s encrypted data to the shared users’. However, the existing attribute-based proxy re-encryption schemes lack a mechanism of revoking users from the sharing set which is critical for data sharing systems. Therefore, in this paper, we propose a concrete attribute-based proxy re-encryption with direct revocation mechanism (ABPRE-DR) for encrypted data sharing that enables the cloud server to directly revoke users from the original sharing set involved in the re-encryption key. We implemented the new schemes and evaluated its performance. The experimental results show that the proposed ABPRE-DR scheme is efficient and practical.
Recommendations
Attribute-Based Proxy Re-Encryption With Direct Revocation Mechanism for Data Sharing in Clouds
Cloud computing, which provides adequate storage and computation capability, has been a prevalent information infrastructure. Secure data sharing is a basic demand when data was outsourced to a cloud server. Attribute-based proxy re-encryption has been a ...
A ciphertext-policy attribute-based proxy re-encryption scheme for data sharing in public clouds
Ciphertext-policy attribute-based proxy re-encryption CP-ABPRE extends the traditional Proxy Re-Encryption PRE by allowing a semi-trusted proxy to transform a ciphertext under an access policy to another ciphertext with the same plaintext under a new ...
A pairing-free certificate-based proxy re-encryption scheme for secure data sharing in public clouds
To assure the confidentiality of the sensitive data stored in public cloud storages, the data owners should encrypt their data before submitting them to the clouds. However, it brings new challenge for us to effectively share the encrypted data in the ...
Comments