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학술지 Constructing Strong Identity-Based Designated Verifier Signatures with Self-Unverifiability
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저자
기주희, 황정연, 양대헌, 장범환, 이동훈, 임종인
발행일
201204
출처
ETRI Journal, v.34 no.2, pp.235-244
ISSN
1225-6463
출판사
한국전자통신연구원 (ETRI)
DOI
https://dx.doi.org/10.4218/etrij.12.0111.0597
협약과제
11ZS1100, 지식서비스기반 SW 핵심기술연구, 황승구
초록
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.
키워드
Identity-based designated verifier signature, Privacy, Self-unverifiability, Strongness
KSP 제안 키워드
Signature scheme, Strong designated verifier signature, generic method, identity-based, key encapsulation, key sharing, non-transferability, secret key