CRYPTO '93 Proceedings of the 13th annual international cryptology conference on Advances in cryptology
Revocation and Tracing Schemes for Stateless Receivers
CRYPTO '01 Proceedings of the 21st 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
A Revocation Scheme with Minimal Storage at Receivers
ASIACRYPT '02 Proceedings of the 8th International Conference on the Theory and Application of Cryptology and Information Security: Advances in Cryptology
Efficient Trace and Revoke Schemes
FC '00 Proceedings of the 4th International Conference on Financial Cryptography
Indentity-based broadcast signcryption
Computer Standards & Interfaces
Short Signatures Without Random Oracles and the SDH Assumption in Bilinear Groups
Journal of Cryptology
Identity-based broadcast encryption with constant size ciphertexts and private keys
ASIACRYPT'07 Proceedings of the Advances in Crypotology 13th international conference on Theory and application of cryptology and information security
ASIACRYPT'05 Proceedings of the 11th international conference on Theory and Application of Cryptology and Information Security
Efficient and provably-secure identity-based signatures and signcryption from bilinear maps
ASIACRYPT'05 Proceedings of the 11th international conference on Theory and Application of Cryptology and Information Security
Implementing cryptographic pairings on smartcards
CHES'06 Proceedings of the 8th international conference on Cryptographic Hardware and Embedded Systems
Identity-Based authenticated broadcast encryption and distributed authenticated encryption
ASIAN'04 Proceedings of the 9th Asian Computing Science conference on Advances in Computer Science: dedicated to Jean-Louis Lassez on the Occasion of His 5th Cycle Birthday
Collusion resistant broadcast encryption with short ciphertexts and private keys
CRYPTO'05 Proceedings of the 25th annual international conference on Advances in Cryptology
Hierarchical identity based encryption with constant size ciphertext
EUROCRYPT'05 Proceedings of the 24th annual international conference on Theory and Applications of Cryptographic Techniques
Pairing'07 Proceedings of the First international conference on Pairing-Based Cryptography
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We propose two public-key broadcast encryption schemes. Our Scheme1 is a variant of the dynamic broadcast encryption scheme proposed by Delerablée et al.[9]. The computational cost and the encryption (public) key size are more efficient than the original scheme. We observe that by using a decryption key in the original scheme, we can encrypt a message more efficiently without a part of an encryption key. In order to let any user receive this benefit, we introduce a "dummy key" which is similar to a decryption key. Scheme2 is an extension of Scheme1 to achieve an authenticated dynamic broadcast encryption scheme that enables receivers to verify the producer of broadcasted content. In Scheme2 , we adopt the signature scheme proposed by Barreto et al. [3]. To our knowledge, Scheme2 is the first scheme that achieves provable security for broadcast encryption and signature with common parameters and keys.