摘要
针对指定验证者签名权的授权攻击以及强指定验证者签名的弱不可授权性,提出了强指定验证者签名的签名者身份的强保密性,即要求强指定验证者签名方案在授权的情况下签名者的身份是保密的.证明了存在满足该性质的强指定验证者签名方案.最后证明了该概念与共同密钥和强指定验证者签名是一致的,且不同于弱不可授权性,该概念同时适用于强指定验证者签名与指定验证者签名,即弱不可授权性是冗余的.
Aimed to the attack on delegatability for designated verifier signature (DVS) and the property of weak non-delegatability for strong designated verifier signature (SDVS), a notion of strong privacy of signer's identity for SDVS was proposed, which is the privacy of signer's identity under the delegatability notion. Then it was shown that there exists the scheme which satisfies this property. Finally this notion was verified to be consistent with the notion of common key delegation and the concept of SDVS. Unlike the previous definition of weak non-delegatability, this notion is applicable to both DVS and SDVS schemes, which means that weak non-delegatability is redundant.
出处
《浙江大学学报(工学版)》
EI
CAS
CSCD
北大核心
2009年第2期334-337,343,共5页
Journal of Zhejiang University:Engineering Science
关键词
强指定验证者签名
不可授权性
签名者身份的强保密性
strong designated verifier signature
non-delegatability
strong privacy of signer's identity