Identity-based cryptosystems and signature schemes
Proceedings of CRYPTO 84 on Advances in cryptology
Robust threshold DSS signatures
Information and Computation
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
Secure Distributed Key Generation for Discrete-Log Based Cryptosystems
Journal of Cryptology
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
Multi-authority attribute based encryption
TCC'07 Proceedings of the 4th conference on Theory of cryptography
Fuzzy identity-based encryption
EUROCRYPT'05 Proceedings of the 24th annual international conference on Theory and Applications of Cryptographic Techniques
Decentralizing attribute-based encryption
EUROCRYPT'11 Proceedings of the 30th Annual international conference on Theory and applications of cryptographic techniques: advances in cryptology
Fully secure multi-authority ciphertext-policy attribute-based encryption without random oracles
ESORICS'11 Proceedings of the 16th European conference on Research in computer security
Attribute-based encryption without key cloning
International Journal of Applied Cryptography
Attribute-based encryption without key cloning
International Journal of Applied Cryptography
Hidden access structure ciphertext policy attribute based encryption with constant length ciphertext
ADCONS'11 Proceedings of the 2011 international conference on Advanced Computing, Networking and Security
A general construction for multi-authority attribute-based encryption
AICI'12 Proceedings of the 4th international conference on Artificial Intelligence and Computational Intelligence
Flexible multi-authority attribute-based signature schemes for expressive policy
Mobile Information Systems - Advances in Network-Based Information Systems
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An attribute based encryption scheme (ABE) is a cryptographic primitive in which every user is identified by a set of attributes, and some function of these attributes is used to determine the ability to decrypt each ciphertext. Chase proposed the first multi authority ABE scheme in TCC 2007 as an answer to an open problem presented by Sahai and Waters in EUROCRYPT 2005. However, her scheme needs a fully trusted central authority which can decrypt every ciphertext in the system. This central authority would endanger the whole system if it's corrupted. This paper presents a threshold multi authority fuzzy identity based encryption(MA-FIBE) scheme without a central authority for the first time. An encrypter can encrypt a message such that a user could only decrypt if he has at least d k of the given attributes about the message for at least t + 1, t ≤ n /2 honest authorities of all the n attribute authorities in the proposed scheme. The security proof is based on the secrecy of the underlying joint random secret sharing protocol and joint zero secret sharing protocol and the standard decisional bilinear Diffie-Hellman assumption. The proposed MA-FIBE could be extended to the threshold multi authority attribute based encryption (MA-ABE) scheme and be further extended to a proactive MA-ABE scheme.