Identity-based cryptosystems and signature schemes
Proceedings of CRYPTO 84 on 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
Direct chosen ciphertext security from identity-based techniques
Proceedings of the 12th ACM conference on Computer and communications security
Multi-receiver identity-based key encapsulation with shortened ciphertext
INDOCRYPT'06 Proceedings of the 7th international conference on Cryptology in India
Efficient multi-receiver identity-based encryption and its application to broadcast encryption
PKC'05 Proceedings of the 8th international conference on Theory and Practice in Public Key Cryptography
Improved efficiency for CCA-secure cryptosystems built using identity-based encryption
CT-RSA'05 Proceedings of the 2005 international conference on Topics in Cryptology
Collusion resistant broadcast encryption with short ciphertexts and private keys
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
Hierarchical identity based encryption with constant size ciphertext
EUROCRYPT'05 Proceedings of the 24th annual international conference on Theory and Applications of Cryptographic Techniques
Generalization of the Selective-ID security model for HIBE protocols
PKC'06 Proceedings of the 9th international conference on Theory and Practice of Public-Key Cryptography
Practical identity-based encryption without random oracles
EUROCRYPT'06 Proceedings of the 24th annual international conference on The 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
Efficient identity-based key encapsulation to multiple parties
IMA'05 Proceedings of the 10th international conference on Cryptography and Coding
Generalized key delegation for hierarchical identity-based encryption
ESORICS'07 Proceedings of the 12th European conference on Research in Computer Security
Efficient Signcryption Key Encapsulation without Random Oracles
Information Security and Cryptology
Broadcast encryption with multiple trust authorities
LATINCRYPT'10 Proceedings of the First international conference on Progress in cryptology: cryptology and information security in Latin America
Exclusion-intersection encryption
International Journal of Security and Networks
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Multi-receiver Identity-Based Key Encapsulation Mechanism (mIB-KEM) allows a sender to distribute messages for a set of receivers using the receiver's identity as a public key. Recently, Chatterjee and Sarkar [12] suggested a new mIB-KEM which has sublinear-size ciphertexts and private keys simultaneously. They demonstrated that their scheme is secure against chosen plaintext (or ciphertext) attacks without random oracles. In this paper, we show that their scheme is not secure in that a revoked user can easily decrypt cipher-texts. We next propose a new mIB-KEM which overcomes the security flaw identified in the construction of Chatterjee and Sarkar.