A public key cryptosystem and a signature scheme based on discrete logarithms
Proceedings of CRYPTO 84 on Advances in cryptology
On the Exact Security of Full Domain Hash
CRYPTO '00 Proceedings of the 20th Annual International Cryptology Conference on Advances in Cryptology
Secure Integration of Asymmetric and Symmetric Encryption Schemes
CRYPTO '99 Proceedings of the 19th Annual International Cryptology Conference on Advances in Cryptology
Improved proxy re-encryption schemes with applications to secure distributed storage
ACM Transactions on Information and System Security (TISSEC)
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
Tracing Malicious Proxies in Proxy Re-encryption
Pairing '08 Proceedings of the 2nd international conference on Pairing-Based Cryptography
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
CCA-Secure Proxy Re-encryption without Pairings
Irvine Proceedings of the 12th International Conference on Practice and Theory in Public Key Cryptography: PKC '09
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
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
Proxy re-encryption systems for identity-based encryption
Pairing'07 Proceedings of the First international conference on Pairing-Based Cryptography
Identity-based proxy re-encryption without random oracles
ISC'07 Proceedings of the 10th international conference on Information Security
Chosen-ciphertext secure bidirectional proxy re-encryption schemes without pairings
Information Sciences: an International Journal
Interactive conditional proxy re-encryption with fine grain policy
Journal of Systems and Software
Efficient bidirectional proxy re-encryption with direct chosen-ciphertext security
Computers & Mathematics with Applications
Further observation on proxy re-encryption with keyword search
Journal of Systems and Software
Hierarchical conditional proxy re-encryption
Computer Standards & Interfaces
Anonymous ID-based proxy re-encryption
ACISP'12 Proceedings of the 17th Australasian conference on Information Security and Privacy
Chosen-ciphertext secure anonymous conditional proxy re-encryption with keyword search
Theoretical Computer Science
A CCA-Secure identity-based conditional proxy re-encryption without random oracles
ICISC'12 Proceedings of the 15th international conference on Information Security and Cryptology
Proxy-invisible CCA-secure type-based proxy re-encryption without random oracles
Theoretical Computer Science
On secure data sharing in cloud environment
Proceedings of the 8th International Conference on Ubiquitous Information Management and Communication
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Recently, a variant of proxy re-encryption, named conditional proxy re-encryption (C-PRE), has been introduced. Compared with traditional proxy re-encryption, C-PRE enables the delegator to implement fine-grained delegation of decryption rights, and thus is more useful in many applications. In this paper, based on a careful observation on the existing definitions and security notions for C-PRE, we re-formalize more rigorous definition and security notions for C-PRE. We further propose a more efficient C-PRE scheme, and prove its chosen-ciphertext security under the decisional bilinear Diffie-Hellman (DBDH) assumption in the random oracle model. In addition, we point out that a recent C-PRE scheme fails to achieve the chosen-ciphertext security.