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
Identity-Based Encryption from the Weil Pairing
CRYPTO '01 Proceedings of the 21st 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
Chosen-Ciphertext Secure Proxy Re-encryption without Pairings
CANS '08 Proceedings of the 7th International Conference on Cryptology and Network Security
Key-Private Proxy Re-encryption
CT-RSA '09 Proceedings of the The Cryptographers' Track at the RSA Conference 2009 on Topics in Cryptology
Chosen-ciphertext secure key-encapsulation based on gap hashed Diffie-Hellman
PKC'07 Proceedings of the 10th international conference on Practice and theory in public-key cryptography
A forward-secure public-key encryption scheme
EUROCRYPT'03 Proceedings of the 22nd international conference on Theory and applications of cryptographic techniques
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
Achieving key privacy without losing CCA security in proxy re-encryption
Journal of Systems and Software
Hierarchical identity based encryption with constant size ciphertext
EUROCRYPT'05 Proceedings of the 24th annual international conference on Theory and Applications of Cryptographic Techniques
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
Efficient CCA-Secure PKE from identity-based techniques
CT-RSA'10 Proceedings of the 2010 international conference on Topics in Cryptology
Generic construction of chosen ciphertext secure proxy re-encryption
CT-RSA'12 Proceedings of the 12th conference on Topics in Cryptology
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Proxy re-encryption (PRE) realizes delegation of decryption rights, enabling a proxy holding a re-encryption key to convert a ciphertext originally intended for Alice into an encryption of the same message for Bob, and cannot learn anything about the encrypted plaintext. PRE is a very useful primitive, having many applications in distributed file systems, outsourced filtering of encrypted spam, access control over network storage, confidential email, digital right management, and so on. In CT-RSA2012, Hanaoka et al. proposed a chosen-ciphertext (CCA) security definition for PRE, and claimed that it is stronger than all the previous works. Their definition is a somewhat strengthened variant of the replayable-CCA one, however, it does not fully capture the CCA security notion. In this paper, we present a full CCA security definition which is extended from theirs. We then propose the first PRE scheme with this security in the standard model (i.e. without the random oracle idealization). Our scheme is efficient and relies on mild complexity assumptions in bilinear groups.