摘要： RFID无线通信的方式和无可视性读写要求带来了很多安全隐患，针对RFID技术在安全隐私方面存在的威胁，在分析几种典型的RFID安全隐私保护方法的特点和局限的基础上，提出了一种新的方法——Key值更新随机Hash锁。该方法使用单向Hash函数添加随机Hash锁，并在每次通信过程中更新标签Key值，且标签与阅读器之间的数据传输都经过了Hash加密，有效地防止了非法读取、位置跟踪、窃听、伪装哄骗、重放等攻击。分析表明，该方法具有成本低、前向安全、负载小、效率高、安全性好等特点，适用于标签数目较多的 情况。

关键词: RFID, 安全隐私, Key值, 随机Hash锁

Abstract: RFID brings in security and privacy hidden trouble because of its wireless communication mode and no demand for visibility, a new approach——key value renewal random lock is proposed based on the analysis of some kinds of typical methods. Through taking in the random hash lock with one-way Hash function, renewing the tag’s key value in each communication process and encrypting the data transported between tags and reader by Hash function, this approach efficiently prevents unauthorized reading, location track, wiretapping, counterfeit and spoofing, replay attack and so on. Analysis shows that this approach is low-cost, forward secure, low-load, high efficiency, good security and fits for the scenario when the tags number is large.

Key words: RFID, Security and privacy, Key value, Random Hash lock