Secure Integration of Asymmetric and Symmetric Encryption Schemes
CRYPTO '99 Proceedings of the 19th Annual International Cryptology Conference on Advances in Cryptology
Attribute-based encryption for fine-grained access control of encrypted data
Proceedings of the 13th ACM conference on Computer and communications security
Chosen-ciphertext secure proxy re-encryption
Proceedings of the 14th ACM conference on Computer and communications security
Identity-Based Proxy Re-encryption
ACNS '07 Proceedings of the 5th international conference on Applied Cryptography and Network Security
Type-Based Proxy Re-encryption and Its Construction
INDOCRYPT '08 Proceedings of the 9th International Conference on Cryptology in India: Progress in Cryptology
Chosen-Ciphertext Secure Proxy Re-encryption without Pairings
CANS '08 Proceedings of the 7th International Conference on Cryptology and Network Security
Attribute based proxy re-encryption with delegating capabilities
Proceedings of the 4th International Symposium on Information, Computer, and Communications Security
Conditional proxy re-encryption secure against chosen-ciphertext attack
Proceedings of the 4th International Symposium on Information, Computer, and Communications Security
Conditional Proxy Broadcast Re-Encryption
ACISP '09 Proceedings of the 14th Australasian Conference on Information Security and Privacy
Efficient Conditional Proxy Re-encryption with Chosen-Ciphertext Security
ISC '09 Proceedings of the 12th International Conference on Information Security
Anonymous Conditional Proxy Re-encryption without Random Oracle
ProvSec '09 Proceedings of the 3rd International Conference on Provable Security
Unidirectional chosen-ciphertext secure proxy re-encryption
PKC'08 Proceedings of the Practice and theory in public key cryptography, 11th international conference on Public key cryptography
New constructions for identity-based unidirectional proxy re-encryption
Journal of Computer Science and Technology
Fuzzy identity-based encryption
EUROCRYPT'05 Proceedings of the 24th annual international conference on Theory and Applications of Cryptographic Techniques
Efficient unidirectional proxy re-encryption
AFRICACRYPT'10 Proceedings of the Third international conference on Cryptology in Africa
End-to-end policy based encryption techniques for multi-party data management
Computer Standards & Interfaces
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Abstract: Conditional proxy re-encryption (C-PRE) allows a semi-trusted proxy to convert a ciphertext satisfying one conditional set by sender into an encryption of the same message intended for a different recipient than the one that was originally intended to. In ISC 2009, Weng, Yang, Tang, Deng, and Bao proposed an efficient CCA secure C-PRE scheme, and left an open problem on how to construct CCA-secure C-PRE schemes supporting ''OR'' and ''AND'' gates over conditions. In this paper, we made the first attempt in constructing C-PRE schemes with richer policy, and hence addressing the problem raised by Weng et al. Nevertheless, our scheme is an interactive scheme. The 'interactive setting' used in our scheme refers to the case where the re-encryption key generation algorithm requires the involvement of the private key of the delegator and delegatee. As a consequence, we call our new cryptographic primitive as interactive conditional proxy re-encryption with fine grain policy (ICPRE-FG). This notion basically enhances the notion of PRE by enabling the features from the attribute-based encryption (ABE). That means, our ICPRE-FG has been constructed from a careful combination of the existing PRE and ABE techniques. In an ICPRE-FG system, each ciphertext is labeled by the delegator with a set of descriptive conditions and each re-encryption key is associated with an access tree that specifies which type of ciphertexts the key can re-encrypt. We formalize the security model of ICPRE-FG, and then we present a new and efficient construction of ICPRE-FG scheme with CCA-security under the well-studied assumption in the random oracle model.