@inproceedings{5f02241fa03341e3b755cdda55d675b3,
title = "Cryptanalysis and improvement of a multi-receiver identity-based key encapsulation at INDOCRYPT 06",
abstract = "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 mIBKEM 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 ciphertexts. We next propose a new mIB-KEM which overcomes the security flaw identified in the construction of Chatterjee and Sarkar.",
keywords = "Multi-receiver identity-based key encapsulation",
author = "Park, {Jong Hwan} and Kim, {Ki Tak} and Lee, {Dong Hoon}",
year = "2008",
doi = "10.1145/1368310.1368366",
language = "English",
isbn = "9781595939791",
series = "Proceedings of the 2008 ACM Symposium on Information, Computer and Communications Security, ASIACCS '08",
pages = "373--380",
booktitle = "Proceedings of the 2008 ACM Symposium on Information, Computer and Communications Security, ASIACCS '08",
note = "2008 ACM Symposium on Information, Computer and Communications Security, ASIACCS '08 ; Conference date: 18-03-2008 Through 20-03-2008",
}