【摘要】 分析了密码技术中的两个基本特性：保密性和认证性，提出了设计安全认证密钥分配协议的基本准则．按照该准则对Ｎｅｅｄｈａｍ－Ｓｃｈｒｏｄｅｒ认证协议进行了分析，发现了该协议的漏洞，又根据这些安全准则设计了一类新的身份认证与密钥分配协议．分析结果表明：按这些安全准则设计的身份认证与密钥分配协议不仅安全性高，而且冗余少，效率高．更多还原

【Abstract】 The confidentiality and authenticity of cryptology have been thoroughly analyzed and some rules have been proposed for designing secure authenticated key distribution protocols. We have analyzed the authentication protocol designed by R.M.Needham and M.D.Schroder and found its drawback according to the above rules. Finally, we have designed a new authenticated key distribution protocol, which has high security and low complexity.更多还原