Public-key encryption in a multi-user setting: security proofs and improvements
EUROCRYPT'00 Proceedings of the 19th international conference on Theory and application of cryptographic techniques
Adaptive Security in Broadcast Encryption Systems (with Short Ciphertexts)
EUROCRYPT '09 Proceedings of the 28th Annual International Conference on Advances in Cryptology: the Theory and Applications of Cryptographic Techniques
Efficient ID-based multi-decrypter encryption with short ciphertexts
Journal of Computer Science and Technology
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ACISP '09 Proceedings of the 14th Australasian Conference on Information Security and Privacy
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
Randomness reuse: extensions and improvements
Cryptography and Coding'07 Proceedings of the 11th IMA international conference on Cryptography and coding
Generic one round group key exchange in the standard model
ICISC'09 Proceedings of the 12th international conference on Information security and cryptology
Towards provably secure group key agreement building on group theory
VIETCRYPT'06 Proceedings of the First international conference on Cryptology in Vietnam
Multi-receiver identity-based key encapsulation with shortened ciphertext
INDOCRYPT'06 Proceedings of the 7th international conference on Cryptology in India
Efficient identity-based key encapsulation to multiple parties
IMA'05 Proceedings of the 10th international conference on Cryptography and Coding
Scalable deniable group key establishment
FPS'12 Proceedings of the 5th international conference on Foundations and Practice of Security
Proceedings of the first ACM workshop on Asia public-key cryptography
Exposure-resilient one-round tripartite key exchange without random oracles
ACNS'13 Proceedings of the 11th international conference on Applied Cryptography and Network Security
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We present the notion of an mKEM, which is a Key Encapsulation Mechanism (KEM) which takes multiple public keys as input. This has applications where one wishes to encrypt a single large document to a set of multiple recipients, as when one sends an encrypted email to more than one person. We present a security definition and show that the naive approach to implementing an mKEM is secure under this definition. We then go on to present a more efficient construction of an mKEM, which is secure in the random oracle model.