Identity-based cryptosystems and signature schemes
Proceedings of CRYPTO 84 on Advances in cryptology
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CCS '93 Proceedings of the 1st ACM conference on Computer and communications security
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STOC '98 Proceedings of the thirtieth annual ACM symposium on Theory of computing
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ICALP '08 Proceedings of the 35th international colloquium on Automata, Languages and Programming, Part II
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TCC '09 Proceedings of the 6th Theory of Cryptography Conference on Theory of Cryptography
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Information Sciences: an International Journal
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Computers and Electrical Engineering
Unbounded HIBE and attribute-based encryption
EUROCRYPT'11 Proceedings of the 30th Annual international conference on Theory and applications of cryptographic techniques: advances in cryptology
Outsourcing the decryption of ABE ciphertexts
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Combined public-key schemes: the case of ABE and ABS
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Designs, Codes and Cryptography
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Attributes define, classify, or annotate the datum to which they are assigned. However, traditional attribute architectures and cryptosystems are ill-equipped to provide security in the face of diverse access requirements and environments. In this paper, we introduce a novel secure information management architecture based on emerging attribute-based encryption (ABE) primitives. A policy system that meets the needs of complex policies is defined and illustrated. Based on the needs of those policies, we propose cryptographic optimizations that vastly improve enforcement efficiency. We further explore the use of such policies in two example applications: a HIPAA compliant distributed file system and a social network. A performance analysis of our ABE system and example applications demonstrates the ability to reduce cryptographic costs by as much as 98% over previously proposed constructions. Through this, we demonstrate that our attribute system is an efficient solution for securely managing information in large, loosely-coupled, distributed systems.