Role-Based Access Control Models
Computer
Identity-Based Encryption from the Weil Pairing
CRYPTO '01 Proceedings of the 21st 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
Ciphertext-Policy Attribute-Based Encryption
SP '07 Proceedings of the 2007 IEEE Symposium on Security and Privacy
Attribute-based encryption with non-monotonic access structures
Proceedings of the 14th ACM conference on Computer and communications security
Provably secure ciphertext policy ABE
Proceedings of the 14th ACM conference on Computer and communications security
Bounded Ciphertext Policy Attribute Based Encryption
ICALP '08 Proceedings of the 35th international colloquium on Automata, Languages and Programming, Part II
A Ciphertext-Policy Attribute-Based Encryption Scheme with Constant Ciphertext Length
ISPEC '09 Proceedings of the 5th International Conference on Information Security Practice and Experience
Privacy-Aware Attribute-Based Encryption with User Accountability
ISC '09 Proceedings of the 12th International Conference on Information Security
Dual System Encryption: Realizing Fully Secure IBE and HIBE under Simple Assumptions
CRYPTO '09 Proceedings of the 29th Annual International Cryptology Conference on Advances in Cryptology
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
Attribute-based encryption with partially hidden encryptor-specified access structures
ACNS'08 Proceedings of the 6th international conference on Applied cryptography and network security
Proceedings of the 17th ACM conference on Computer and communications security
PKC'11 Proceedings of the 14th international conference on Practice and theory in public key cryptography conference on Public key cryptography
Fully secure cipertext-policy hiding CP-ABE
ISPEC'11 Proceedings of the 7th international conference on Information security practice and experience
Evaluating 2-DNF formulas on ciphertexts
TCC'05 Proceedings of the Second international conference on Theory of Cryptography
Efficient identity-based encryption without random oracles
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
Constant size ciphertexts in threshold attribute-based encryption
PKC'10 Proceedings of the 13th international conference on Practice and Theory in Public Key Cryptography
EUROCRYPT'10 Proceedings of the 29th Annual international conference on Theory and Applications of Cryptographic Techniques
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In an anonymous ciphertext-policy attribute-based encryption (CP-ABE) scheme, the encryptor-specified access structure is hidden in ciphertexts. The decryptor gets his secret key from a trust authority according to his attributes. However, he cannot decrypt any ciphertext or guess even what access structure was specified by the encryptor if his attributes do not satisfy the access structure associated with the ciphertext. All previous anonymous CP-ABE schemes are inefficient in that each ciphertext grows linearly with the number of attributes. In this paper, we propose an efficient anonymous CP-ABE scheme that reduces both the length of each ciphertext and the number of pairing operations to a constant level, but still leverages a hidden policy to keep recipients' privacy preserved. Furthermore, our scheme is fully secure in the standard model based on the decisional Bilinear Diffie-Hellman (DBDH) assumption in composite order groups. We remark that in our security definition, only the legitimate decryptor knows access structures associated with ciphertexts.