电子商务安全体系反映了电子商务安全涉及内容和相关技术，由网络服务层、加密技术层、安全认证层、安全协议层、应用系统层组成。其中，入侵检测是（ ）应完成功能之一。
- A.网络服务层
- B.加密技术层
- C.安全认证层
- D.安全协议层
正确答案及解析
正确答案
解析
本题考查电子商务安全体系方面基础知识。电子商务交易过程面临着信息截取和窃取、信息篡改、信息假冒、信息抵赖等威胁，对电子商务交易信息安全提出了保密性、完整性、不可否认性、身份可认证性、可用性和可控性安全需求。电子商务安全涉及计算机网络安全和商务交易安全，二者相辅相成，缺一不可。电子商务安全体系反映了电子商务安全涉及内容和相关技术。在电子商务安全体系结构层次中，下层是上层基础，为上层提供技术支持；上层是下层扩展与递进。层次之间相互依赖、相互关联构成统一整体。每一层通过各自安全控制技术，实现各层安全策略，保证电子商务系统安全。①网络服务层为电子商务系统提供基本、灵活网络服务，是各种电子商务应用系统基础，提供信息传送载体和用户接入手段。通过Internet网络层安全机制(如入侵检测、安全扫描、防火墙等技术)保证网络层安全。②加密技术是保证电子商务交易安全所采用最基本安全措施，它用于满足电子商务对保密性需求。加密技术层采用对称加密和非对称加密技术保障信息安全。③安全认证层对加密技术层中提供多种加密算法进行综合运用，进一步满足电子商务对完整性、不可抵赖性等要求。主要完成功能是数字摘要、数字签名、数字证书、认证中心等。④安全协议层是加密技术层和安全认证层安全控制技术综合运用和完善，为电子商务安全交易提供保障机制和交易标准。包括SSL协议、SET协议等。
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