Identity-based cryptosystems and signature schemes
Proceedings of CRYPTO 84 on Advances in cryptology
Communications of the ACM
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
An Identity Based Encryption Scheme Based on Quadratic Residues
Proceedings of the 8th IMA International Conference on Cryptography and Coding
Attribute-based encryption for fine-grained access control of encrypted data
Proceedings of the 13th ACM conference on Computer and communications security
Secure attribute-based systems
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
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
Multi-authority attribute based encryption
TCC'07 Proceedings of the 4th conference on Theory of cryptography
Access control using pairing based cryptography
CT-RSA'03 Proceedings of the 2003 RSA conference on The cryptographers' track
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
Searchable encryption revisited: consistency properties, relation to anonymous IBE, and extensions
CRYPTO'05 Proceedings of the 25th annual international conference on Advances in Cryptology
Fuzzy identity-based encryption
EUROCRYPT'05 Proceedings of the 24th annual international conference on Theory and Applications of Cryptographic Techniques
Anonymous hierarchical identity-based encryption (without random oracles)
CRYPTO'06 Proceedings of the 26th annual international conference on Advances in Cryptology
Mediated Ciphertext-Policy Attribute-Based Encryption and Its Application
Information Security Applications
Oblivious transfer with complex attribute-based access control
ICISC'10 Proceedings of the 13th international conference on Information security and cryptology
Comparison-based encryption for fine-grained access control in clouds
Proceedings of the second ACM conference on Data and Application Security and Privacy
A ciphertext policy attribute-based encryption scheme without pairings
Inscrypt'11 Proceedings of the 7th international conference on Information Security and Cryptology
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With a Ciphertext-Policy Attribute-Based Encryption (CP-ABE) scheme, a user's private key is associated with a set of attributes and the data is encrypted under an access policy defined by the message sender. A user can decrypt a ciphertext if and only if her attributes satisfy the access policy. In CP-ABE, since the message sender enforces the access policy during the encryption phase, the policy moves with the encrypted data. In this paper, we provide an efficient CP-ABE scheme which can express any access policy represented by a formula involving the and (***) and or (***) operators. The scheme is secure under Decision Bilinear Diffie-Hellman (DBDH) assumption. Furthermore, we extend the expressiveness of the scheme by including the of operator in addition to *** and ***. We provide a comparison with some existing CP-ABE schemes and show that our schemes are more efficient.