现场总线中一种基于时间的信息认证方案

A Method of Time-based Information Certification in Fieldbus

信息认证是指对网络中传输信息可靠性及完整性的确认,它在各类网络环境下的控制系统、电子商务、电子政务等多个领域有着重要而广泛的应用。目前采用的主要技术手段是采用询问- 应答机制,通过消息认证码实现。本文介绍了几种现有的信息认证方案,并结合现场总线控制系统中数据信息小、实时性高的特点,提出了一个基于时间的信息认证方案。它使用时间和消 息认证码 MAC,实现控制双方的双向认证,在运算量、速度方面都要优于现有的方案。

Information certification is a validation of information reliability and integrality to messages transmitted in the network. It is widely used in control system, E-commerce and E-government in various networks. At present the main technique adopted is request-response scheme with message certification code. This paper introduces the up-to-date certification scheme and presents a time-based scheme in accordance with the feature of FCS: lesser message and higher advantages over other schemes in efficiency and other aspects.