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Journal Article
Constructing Strong Identity-Based Designated Verifier Signatures with Self-Unverifiability
- Authors
- JuHee Ki, Jung Yeon Hwang, DaeHun Nyang, Beom-Hwan Chang, Dong Hoon Lee, Jong-in Lim
- Issue Date
- 2012-04
- Citation
- ETRI Journal, v.34, no.2, pp.235-244
- ISSN
- 1225-6463
- Publisher
- 한국전자통신연구원 (ETRI)
- Language
- English
- Type
- Journal Article
- Abstract
- An identity-based strong designated verifier signature scheme provides restricted verifiability only for a verifier designated by a signer and proper privacy for the signer. In this paper, we show that strong designated verifier signature schemes do not satisfy the self-unverifiability requirement in the sense that not only exposure of the verifier's secret key but also of the signer's secret key enables an attacker to verify signatures, which should have been the exclusive right of the verifier. We also present a generic method to construct a strong identitybased designated verifier signature scheme with selfunverifiability from identity-based key encapsulation and identity-based key sharing schemes. We prove that a scheme constructed from our method achieves unforgeability, non-transferability, and self-unverifiability if the two underlying components are secure. To show the advantage of our method, we present an example that outputs short signatures and we analyze its performance. © 2012 ETRI.
- KSP Keywords
- Signature scheme, Strong designated verifier signature, generic method, identity-based, key encapsulation, key sharing, non-transferability, secret key