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Forward-Secure Multisignature, Threshold Signature and Blind Signature Schemes

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Author(s): Jia Yu | Fanyu Kong | Xiangguo Cheng | Rong Hao | Yangkui Chen | Xuliang Li | Guowen Li

Journal: Journal of Networks
ISSN 1796-2056

Volume: 5;
Issue: 6;
Start page: 634;
Date: 2010;
Original page

Keywords: multisignature | threshold signature | secret sharing | blind signature | forward security

ABSTRACT
Forward-secure signatures are proposed to tackle the key exposure problem, in which the security of all signatures prior to key leakage is still kept even if the secret key leaks. In this paper, we construct two forward-secure multisignature schemes, one forward-secure threshold signature scheme, and one forward-secure blind signature scheme. Our constructions are based on the recently proposed forward-secure signature scheme from bilinear maps in [11]. Our constructions are very efficient and useful thanks to the elegant structure of the base scheme. Such schemes play an important role in many electronic applications such as cryptographic election systems, digital cash schemes, and e-cheques.
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