Cipher Text Policy Attribute Based Broadcast
Encryption for Multi-Privileged Groups
Muthulakshmi Angamuthu1, Akshaya Mani2,
and Anitha Ramalingam3
1Department of Mathematics, PSG College of Technology, India
2Department of Computer Science, Georgetown University, USA
3Department of Applied Mathematics
and Computational Sciences, PSG College of Technology, India
Abstract: In
the current globalization scenario, many group communication applications have
become vital and the users not only subscribe to a single resource, but they
use multiple resources and hence ending up with multi-privileged groups. In
some group communication applications, it is desirable to encrypt the contents
without exact knowledge of the set of intended receivers. Attribute based
encryption offers this ability and enforces access policies defined on
attributes, within the encryption process. In these schemes, the encryption
keys and/or cipher texts are labelled with sets of descriptive attributes
defined for the system users, and a particular user private key can decrypt
only if the two match. This paper presents a cipher text policy attribute based
broadcast encryption scheme for multi-privileged group of users. The proposed
scheme has been proved secure using random oracle model.
Keywords: Attribute based broadcast encryption,
decisional bilinear diffie hellman problem and decisional diffie hellman problem,
multi-privileged groups, cipher text policy.
Received June 8, 2014; accepted March 15, 2015
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