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Springer Verlag (Germany), IFIP Advances in Information and Communication Technology , p. 443-457, 2005

DOI: 10.1007/0-387-25660-1_29

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Signcryption in Hierarchical Identity Based Cryptosystem

Journal article published in 1969 by Sherman S. M. Chow ORCID, Lucas C. K. Hui, Lucas Chi Kwong Hui, Tsz Hon Yuen, Sm M. Yiu, Ck Hui
This paper is available in a repository.
This paper is available in a repository.

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Abstract

In many situations we want to enjoy confidentiality, authenticity and non-repudiation of message simultaneously. One approach to achieve this objective is to "sign-then-encrypt" the message, or we can employ special cryptographic scheme like signcryption. Two open problems about identity-based (ID-based) signcryption were proposed in [cite16/cite]. The first one is to devise an efficient forward-secure signcryption scheme with public verifiability and public ciphertext authenticity, which is promptly closed by [cite10/cite]. Another one which still remains open is to devise a hierarchical ID-based signcryption scheme that allows the user to receive signcrypted messages from sender who is under another sub-tree of the hierarchy. This paper aims at solving this problem by proposing two concrete constructions of hierarchical ID-based signcryption. Full Text at Springer, may require registration or fee