Recently, Cheng et al. proposed a novel biometric-based remote userauthentication scheme using quadratic residues. Cheng et al. claimedthat their proposed scheme is secure, practical, and trustworthy remoteauthentication, which can be implemented on di erent real network en-vironments. However, this paper points out that Cheng et al.'s schemenot only su ers from stolen smart card attack and server spoo ng at-tack, but also does not provide forward secrecy.
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机译：最近，程等人。使用二次残基提出了一种基于新型的基于生物识别的远程UseraUthentication方案。程等人。索赔其所提出的计划是安全，实用，可靠的副植物症，其可以在DI Erent Real网络环境中实施。然而，本文指出，Cheng等人。的SemareEnot只有Su ERS来自Stolen智能卡攻击和服务器Spoo NG AT-Tack，但也没有提供前锋保密。
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