An Efficient Certificateless Encryption for Secure Data Sharing in Public Clouds (Data Mining with cloud)

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Name An Efficient Certificateless Encryption for Secure Data Sharing in Public Clouds (Data Mining with cloud)
Technology Dot net, MS SQL
Category Data Mining
Description We propose a mediated certificateless encryption
scheme without pairing operations for securely sharing
sensitive information in public clouds. Mediated
certificateless public key encryption (mCL-PKE)
solves the key escrow problem in identity based
encryption and certificate revocation problem in public
key cryptography. However, existing mCL-PKE
schemes are either inefficient because of the use of
expensive pairing operations or vulnerable against
partial decryption attacks. In order to address the
performance and security issues, in this paper, we first
propose a mCL-PKE scheme without using pairing
operations. We apply our mCL-PKE scheme to
construct a practical solution to the problem of sharing
sensitive information in public clouds. The cloud is
employed as a secure storage as well as a key
generation center. In our system, the data owner
encrypts the sensitive data using the cloud generated
users’ public keys based on its access control policies
and uploads the encrypted data to the cloud. Upon
successful authorization, the cloud partially decrypts
the encrypted data for the users. The users
subsequently fully decrypt the partially decrypted data
using their private keys. The confidentiality of the
content and the keys is preserved with respect to the
cloud, because the cloud cannot fully decrypt the
information. We also propose an extension to the above
approach to improve the efficiency of encryption at the
data owner. We implement our mCL-PKE scheme and
the overall cloud based system, and evaluate its
security and performance. Our results show that our
schemes are efficient and practical.
IEEE Paper Yes
IEEE Paper Year 2014
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