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Identity-based aggregate signcryption in the standard model from multilinear maps |
Hao WANG1,2,Zhen LIU3,Zhe LIU4,*( ),Duncan S. WONG3 |
1. School of Information Science and Engineering, Shandong Normal University, Jinan 250014, China 2. Shandong Provincial Key Laboratory for Novel Distributed Computer Software Technology, Jinan 250014, China 3. Security and Data Sciences, Hong Kong Applied Science and Technology Research Institute (ASTRI), Hong Kong, China 4. Laboratory of Algorithmics, Cryptology and Security (LACS), University of Luxembourg, Luxembourg L-1359, Luxembourg |
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Abstract Signcryption is a public key cryptographic method that achieves unforgeability and confidentiality simultaneously with significantly smaller overhead than that required by “digital signature followed by public key encryption”. It does this by signing and encrypting a message in a single step. An aggregate signcryption scheme allows individual signcryption ciphertexts intended for the same recipient to be aggregated into a single (shorter) combined ciphertext without losing any of the security guarantees. We present an aggregate signcryption scheme in the identity-based setting using multilinear maps, and provide a proof of security in the standard model. To the best of our knowledge, our new scheme is the first aggregate signcryption scheme that is secure in the standard model.
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Keywords
identity-based aggregate signcryption
multilinear maps
standard model
GGH framework
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Corresponding Author(s):
Zhe LIU
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Just Accepted Date: 11 September 2015
Online First Date: 06 April 2016
Issue Date: 06 July 2016
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