Identity-based cryptosystems and signature schemes
Proceedings of CRYPTO 84 on Advances in cryptology
Identity-Based Encryption from the Weil Pairing
SIAM Journal on Computing
Relations Among Notions of Security for Public-Key Encryption Schemes
CRYPTO '98 Proceedings of the 18th Annual International Cryptology Conference on Advances in Cryptology
Secure Integration of Asymmetric and Symmetric Encryption Schemes
CRYPTO '99 Proceedings of the 19th Annual International Cryptology Conference on Advances in Cryptology
Toward Hierarchical Identity-Based Encryption
EUROCRYPT '02 Proceedings of the International Conference on the Theory and Applications of Cryptographic Techniques: Advances in Cryptology
Hierarchical ID-Based Cryptography
ASIACRYPT '02 Proceedings of the 8th International Conference on the Theory and Application of Cryptology and Information Security: Advances in Cryptology
Proceedings of the 11th ACM conference on Computer and communications security
Certificate-based encryption and the certificate revocation problem
EUROCRYPT'03 Proceedings of the 22nd international conference on Theory and applications of cryptographic techniques
Establishment of Ad-Hoc Communities through Policy-Based Cryptography
Electronic Notes in Theoretical Computer Science (ENTCS)
Stateful identity-based encryption scheme: faster encryption and decryption
Proceedings of the 2008 ACM symposium on Information, computer and communications security
Towards mechanized correctness proofs for cryptographic algorithms
Science of Computer Programming
A variant of Boneh-Franklin IBE with a tight reduction in the random oracle model
Designs, Codes and Cryptography
Efficient Identity-Based Encryption with Tight Security Reduction
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Removing Escrow from Identity-Based Encryption
Irvine Proceedings of the 12th International Conference on Practice and Theory in Public Key Cryptography: PKC '09
Public key broadcast encryption with low number of keys and constant decryption time
PKC'08 Proceedings of the Practice and theory in public key cryptography, 11th international conference on Public key cryptography
Compact identity-based encryption without strong symmetric cipher
Proceedings of the 6th ACM Symposium on Information, Computer and Communications Security
Verifiable security of Boneh-Franklin identity-based encryption
ProvSec'11 Proceedings of the 5th international conference on Provable security
Collusion-Free policy-based encryption
ISC'06 Proceedings of the 9th international conference on Information Security
HIBE with short public parameters without random oracle
ASIACRYPT'06 Proceedings of the 12th international conference on Theory and Application of Cryptology and Information Security
A probabilistic hoare-style logic for game-based cryptographic proofs
ICALP'06 Proceedings of the 33rd international conference on Automata, Languages and Programming - Volume Part II
Reconsideration on the security of the boneh-franklin identity-based encryption scheme
INDOCRYPT'05 Proceedings of the 6th international conference on Cryptology in India
ACISP'06 Proceedings of the 11th Australasian conference on Information Security and Privacy
Efficient identity-based encryption with tight security reduction
CANS'06 Proceedings of the 5th international conference on Cryptology and Network Security
Security proof of sakai-kasahara's identity-based encryption scheme
IMA'05 Proceedings of the 10th international conference on Cryptography and Coding
SAC'11 Proceedings of the 18th international conference on Selected Areas in Cryptography
General and efficient certificateless public key encryption constructions
Pairing'07 Proceedings of the First international conference on Pairing-Based Cryptography
Galindo-Garcia identity-based signature revisited
ICISC'12 Proceedings of the 15th international conference on Information Security and Cryptology
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The first practical identity based encryption (IBE) scheme was proposed by Boneh and Franklin in [BF03]. In this work we point out that there is a flawed step in the security reduction exhibited by the authors. Fortunately, it is possible to fix it without changing the scheme or the underlying assumption. In the second place, we introduce a variant of the seminal IBE scheme which allows a more efficient security reduction. This variant is simpler, and has more compact ciphertexts than Boneh-Franklin’s proposal, while keeping the computational cost. Finally, we observe that the flawed step pointed out here is present in several works, and that our techniques can be applied to obtain tighter reductions for previous relevant schemes.