Ciphertext-Policy Attribute-Based Encryption
SP '07 Proceedings of the 2007 IEEE Symposium on Security and Privacy
Provably secure ciphertext policy ABE
Proceedings of the 14th ACM conference on Computer and communications security
Conjunctive, subset, and range queries on encrypted data
TCC'07 Proceedings of the 4th conference on Theory of cryptography
Predicate encryption supporting disjunctions, polynomial equations, and inner products
EUROCRYPT'08 Proceedings of the theory and applications of cryptographic techniques 27th annual international conference on Advances in cryptology
Collusion resistant broadcast encryption with short ciphertexts and private keys
CRYPTO'05 Proceedings of the 25th annual international conference on Advances in Cryptology
Anonymous encryption with partial-order subset delegation functionality
ProvSec'11 Proceedings of the 5th international conference on Provable security
Threshold ciphertext policy attribute-based encryption with constant size ciphertexts
ACISP'12 Proceedings of the 17th Australasian conference on Information Security and Privacy
Efficient ciphertext-policy attribute based encryption with hidden policy
IDCS'12 Proceedings of the 5th international conference on Internet and Distributed Computing Systems
A scalable encryption scheme for multi-privileged group communications
The Journal of Supercomputing
| Hi-index | 0.00 |
Existing CP-ABE schemes incur very large ciphertext size, which increases linearly with respect to the number of attributes in the access policy. Large ciphertext prevents CP-ABE from being adopted in the communication constrained environments. In this paper, we proposed a new construction of CP-ABE, named Constant-size CP-ABE (denoted as CCP-ABE) that significantly reduces the ciphertext to a constant size for an AND gate access policy with any given number of attributes. Each ciphertext in CCP-ABE requires only elements on a bilinear group. Based on CCP-ABE, we further proposed an Attribute Based Broadcast Encryption (ABBE) scheme. Compared to existing Broadcast Encryption (BE) schemes, ABBE is more flexible because a broadcasted message can be encrypted by an expressive access policy, either with or without explicit specifying the receivers. Moreover, ABBE significantly reduces the storage and communication overhead to the order of $O(\log N)$, where $N$ is the system size.