Identity-based cryptosystems and signature schemes
Proceedings of CRYPTO 84 on Advances in cryptology
Universally composable two-party and multi-party secure computation
STOC '02 Proceedings of the thiry-fourth annual ACM symposium on Theory of computing
Universally Composable Notions of Key Exchange and Secure Channels
EUROCRYPT '02 Proceedings of the International Conference on the Theory and Applications of Cryptographic Techniques: Advances in Cryptology
CRYPTO '02 Proceedings of the 22nd Annual International Cryptology Conference on Advances in Cryptology
Universally Composable Security: A New Paradigm for Cryptographic Protocols
FOCS '01 Proceedings of the 42nd IEEE symposium on Foundations of Computer Science
New notions of security: achieving universal composability without trusted setup
STOC '04 Proceedings of the thirty-sixth annual ACM symposium on Theory of computing
Universally Composable Signature, Certification, and Authentication
CSFW '04 Proceedings of the 17th IEEE workshop on Computer Security Foundations
Universally Composable Protocols with Relaxed Set-Up Assumptions
FOCS '04 Proceedings of the 45th Annual IEEE Symposium on Foundations of Computer Science
On the limitations of universally composable two-party computation without set-up assumptions
EUROCRYPT'03 Proceedings of the 22nd international conference on Theory and applications of cryptographic techniques
A forward-secure public-key encryption scheme
EUROCRYPT'03 Proceedings of the 22nd international conference on Theory and applications of cryptographic techniques
Improved efficiency for CCA-secure cryptosystems built using identity-based encryption
CT-RSA'05 Proceedings of the 2005 international conference on Topics in Cryptology
Secure computation without authentication
CRYPTO'05 Proceedings of the 25th annual international conference on Advances in Cryptology
Efficient identity-based encryption without random oracles
EUROCRYPT'05 Proceedings of the 24th annual international conference on Theory and Applications of Cryptographic Techniques
Games and the impossibility of realizable ideal functionality
TCC'06 Proceedings of the Third conference on Theory of Cryptography
Relations among notions of security for identity based encryption schemes
LATIN'06 Proceedings of the 7th Latin American conference on Theoretical Informatics
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Identity-based encryption (IBE) is one of the most important primitives in cryptography, and various security notions of IBE (e.g., IND-ID-CCA2, NM-ID-CCA2, IND-sID-CPA etc.) have been introduced. The relations among them have been clarified recently. This paper, for the first time, investigates the security of IBE in the universally composable (UC) framework. This paper first defines the UC-security of IBE, i.e., we define the ideal functionality of IBE, FIBE. We then show that UC-secure IBE is equivalent to conventionally-secure (IND-ID-CCA2-secure) IBE.