Abstract
In this paper we analyze the security of Zhang's scheme [Chin. Sci. Bull., 2009, 54: 2018–2021], and find that there are two potential loopholes, i.e. the participants forgery attack and impersonation attack. Then, following the elementary method of Zhang's scheme, we propose a quantum signature-masked authentication scheme, which can be widely used many systems, such as the identity authentication between Digital Set-Top-Box (DSTB) and smart card in secure Digital Video Broadcasting (DVB) service system. In our scheme, a semi-trusted center of authentication CA issues the original credential certificates for a user and the final credential certificates is generated by adding her secret information, that is, the user's final credential certificates is generated by her own and CA together. This new scheme can solve Zhang's scheme security problem. Moreover, analysis results show that our scheme can withstand the forgery attack, impersonation attack and inter-resend attack.
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