On the Proxy-Protected Property of Chen et al.'s Proxy Multisignature Schemes
نویسندگان
چکیده
منابع مشابه
On the Proxy-Protected Property of Chen et al.'s Proxy Multisignature Schemes
Recently, Chen, Chung, and Huang proposed a traceable proxy multisignature scheme based on the elliptic curve cryptosystem. However, this paper shows that the original signers can produce a valid signature as the proxy signer does in the proxy protected scheme. Therefore, Chen et al.’s proxy-protected scheme cannot protect the proxy signer from being forged by the original signers. We further f...
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Proxy signcrytipn scheme allows an original signer to delegate his signing power to a proxy such that the latter can signcrypt a message on behalf of the former. Recently, Lin et al. proposed a proxy signcryption with CCA and CMA security. In this work, we indicate that the Lin et al.’s proxy signcryption scheme does not hold the security of indistinguishability against adaptive chosen-cipherte...
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We consider a generic framework for generating likelihood ratio weighted Monte Carlo simulation paths, where we use one simulation schemeK◦ (proxy scheme) to generate realizations and then reinterpret them as realizations of another scheme K∗ (target scheme) by adjusting measure (via likelihood ratio) to match the distribution ofK∗ such that EQ(f(K∗) | Ft) = EQ(f(K◦) · w | Ft). (1) This is done...
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ژورنال
عنوان ژورنال: Informatica
سال: 2007
ISSN: 0868-4952,1822-8844
DOI: 10.15388/informatica.2007.162