摘要： 无线射频识别(RFID)作为一种新型的自动识别技术正逐渐得到广泛应用，但RFID系统的特点和RFID设备的局限性带来了很多安全隐患问题。针对这些问题，讨论并阐明RFID的系统组成和安全隐患，分析了几种现有的典型的RFID 安全协议的特点和缺陷，提出一种基于密钥矩阵的RFID安全协议。该协议使用密钥矩阵来加密标签和阅读器之间传输的数据，并在认证后更新标签中密值，能有效抵抗多种攻击。分析表明，该协议具有效率高、成本低、安全性高等特点。

关键词: RFID系统, 安全协议, 密钥矩阵

Abstract: Radio Frequency Identification(RFID) as a new automated identification technology has become popular in many applications. But the features of the RFID systems and the constraints of RFID devices bring about various privacy problems. To address these issues, the structure and privacy problems of RFID systems are discussed and clarified in this paper, and the features and issues pertinent to several current typical RFID security protocols are analyzed. A new security protocol for RFID based on key matrix is proposed. Encrypting the data transported between tags and readers by key matrix and renewing the tag’s secret value after each authentication, the protocol efficiently prevents multiple attacks. Analysis shows that this protocol is high efficiency, low-cost and good security.

Key words: RFID system, security protocol, key matrix

中图分类号: 

• TP309