NDLI: Practical verifiably encrypted signature based on Waters signatures

Content Provider	IET Digital Library
Author	Shao, Zuhua Gao, Yipeng
Abstract	Waters proposed the first efficient signature scheme that is known to be existentially unforgeable based on the standard computational Diffie-Hellman assumption without random oracles. Lu et al. then proposed the first verifiably encrypted signature (VES) scheme based on Waters signatures. However, the security proofs of Lu et al. and some other VES schemes are built on the certified-key model, in which the key pair of the adjudicator is chosen by the simulator rather than the signature forger. It demands that the adjudicator must be honest enough never to forge signatures. In the real world, it is hard for users to choose such trusted third party. In this study, the authors first show that Lu et al.’s VES is not secure in the chosen-key model by presenting a rogue key attack. Then they present the first VES scheme based on Waters signatures secure in the chosen-key model, where two inside adversaries, malicious adjudicator and malicious verifier, have more powers than ever.
Starting Page	185
Ending Page	193
Page Count	9
ISSN	17518709
Volume Number	9
e-ISSN	17518717
Issue Number	Issue 3, May (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-ifs/9/3
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-ifs.2013.0385
Journal	IET Information Security
Publisher Date	2014-10-10
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Certified-key Model Cryptography Data Security Digital Signatures Random Oracles Rogue Key Attack Signature Forger Standard Computational Diffie-Hellman Assumption Verifiably Encrypted Signature Scheme VES Scheme Water Signatures
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Information Systems Software

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