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
Efficient Algorithms for Pairing-Based Cryptosystems
CRYPTO '02 Proceedings of the 22nd 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
Fast Encryption and Authentication: XCBC Encryption and XECB Authentication Modes
FSE '01 Revised Papers from the 8th International Workshop on Fast Software Encryption
ANTS-V Proceedings of the 5th International Symposium on Algorithmic Number Theory
Direct chosen ciphertext security from identity-based techniques
Proceedings of the 12th ACM conference on Computer and communications security
Chosen-Ciphertext Security from Identity-Based Encryption
SIAM Journal on Computing
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 general construction of tweakable block ciphers and different modes of operations
Inscrypt'06 Proceedings of the Second SKLOIS conference on Information Security and Cryptology
Efficient identity-based encryption without random oracles
EUROCRYPT'05 Proceedings of the 24th annual international conference on Theory and Applications of Cryptographic Techniques
Tag-KEM/DEM: a new framework for hybrid encryption and a new analysis of kurosawa-desmedt KEM
EUROCRYPT'05 Proceedings of the 24th annual international conference on Theory and Applications of Cryptographic Techniques
Hierarchical identity based encryption with constant size ciphertext
EUROCRYPT'05 Proceedings of the 24th annual international conference on Theory and Applications of Cryptographic Techniques
Direct chosen-ciphertext secure identity-based key encapsulation without random oracles
ACISP'06 Proceedings of the 11th Australasian conference on Information Security and Privacy
New constructions of constant size ciphertext HIBE without random oracle
ICISC'06 Proceedings of the 9th international conference on Information Security and Cryptology
ICISC'05 Proceedings of the 8th international conference on Information Security and Cryptology
Towards Black-Box Accountable Authority IBE with Short Ciphertexts and Private Keys
Irvine Proceedings of the 12th International Conference on Practice and Theory in Public Key Cryptography: PKC '09
Simple CCA-Secure Public Key Encryption from Any Non-Malleable Identity-Based Encryption
Information Security and Cryptology --- ICISC 2008
Direct chosen-ciphertext secure identity-based key encapsulation without random oracles
Theoretical Computer Science
International Journal of Applied Cryptography
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We describe a hybrid hierarchical identity based encryption (HIBE) protocol which is secure in the full model without using the random oracle heuristic and whose security is based on the computational hardness of the decisional bilinear Diffie-Hellman (DBDH) problem. The new protocol is obtained by augmenting a previous construction of a HIBE protocol which is secure against chosen plaintext attacks (CPA-secure). The technique for answering decryption queries in the proof is based on earlier work by Boyen-Mei-Waters. Ciphertext validity testing is done indirectly through a symmetric authentication algorithm in a manner similar to the Kurosawa-Desmedt public key encryption protocol. Additionally, we perform symmetric encryption and authentication by a single authenticated encryption algorithm. A net result of all these is that our construction improves upon previously known constructions in the same setting.