A public key cryptosystem and a signature scheme based on discrete logarithms
Proceedings of CRYPTO 84 on Advances in cryptology
Random oracles are practical: a paradigm for designing efficient protocols
CCS '93 Proceedings of the 1st ACM conference on Computer and communications security
Elliptic curves in cryptography
Elliptic curves in cryptography
Handbook of Applied Cryptography
Handbook of Applied Cryptography
Identity-Based Encryption from the Weil Pairing
CRYPTO '01 Proceedings of the 21st Annual International Cryptology Conference on Advances in Cryptology
Relations Among Notions of Security for Public-Key Encryption Schemes
CRYPTO '98 Proceedings of the 18th Annual International Cryptology Conference on Advances in Cryptology
On Quorum Controlled Asymmetric Proxy Re-encryption
PKC '99 Proceedings of the Second International Workshop on Practice and Theory in Public Key Cryptography
Towards Practical Public Key Systems Secure Against Chosen Ciphertext Attacks
CRYPTO '91 Proceedings of the 11th Annual International Cryptology Conference on Advances in Cryptology
Distributed Blinding for Distributed ElGamal Re-Encryption
ICDCS '05 Proceedings of the 25th IEEE International Conference on Distributed Computing Systems
Improved proxy re-encryption schemes with applications to secure distributed storage
ACM Transactions on Information and System Security (TISSEC)
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Identity-Based Proxy Re-encryption
ACNS '07 Proceedings of the 5th international conference on Applied Cryptography and Network Security
Restricted queries over an encrypted index with applications to regulatory compliance
ACNS'08 Proceedings of the 6th international conference on Applied cryptography and network security
EUROCRYPT'05 Proceedings of the 24th annual international conference on Theory and Applications of Cryptographic Techniques
Proxy re-encryption systems for identity-based encryption
Pairing'07 Proceedings of the First international conference on Pairing-Based Cryptography
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
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
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Recently, the concept of proxy re-encryption has been shown very useful in a number of applications, especially in enforcing access control policies. In existing proxy re-encryption schemes, the delegatee can decrypt all ciphertexts for the delegator after re-encryption by the proxy. Consequently, in order to implement fine-grained access control policies, the delegator needs to either use multiple key pairs or trust the proxy to behave honestly. In this paper, we extend this concept and propose type-based proxy re-encryption, which enables the delegator to selectively delegate his decryption right to the delegatee while only needs one key pair. As a result, type-based proxy re-encryption enables the delegator to implement fine-grained policies with one key pair without any additional trust on the proxy. We provide a security model for our concept and provide formal definitions for semantic security and ciphertext privacy which is a valuable attribute in privacy-sensitive contexts. We propose two type-based proxy re-encryption schemes: one is CPA secure with ciphertext privacy while the other is CCA secure without ciphertext privacy.