基于激活标志位的改进RFID密钥无线生成算法

针对现有三种常见无线射频识别密钥无线生成场景下，设计的相应密钥生成算法中存在的算法理论证明缺失、重放攻击、密钥伪造攻击以及RFID标签身份ID泄露的安全性问题，设计了更安全的基于激活标志位的改进RFID系统密钥无线生成算法。改进算法仅基于多种超轻量级位运算来组合构建安全的算法框架、降低成本和提高效率；利用激活标志位AckBit机制以及新鲜性机制抵抗重放、密钥伪造攻击；通过完整GNY逻辑证明过程与安全性对比进行分析，证明了目标算法的安全可行性。最后，给出原算法与改进算法之间的标签成本代价对比，表明改进的算法在满足低成本的条件下具有更高的安全性。

Improved RFID key wireless generation algorithm based on activation flag

In the scenario of wireless generation of three common radio frequency identification keys, the security key problem of replay attack, key forgery attack and RFID tag identity ID leakage and the lack of algorithm theory are found in the corresponding key generation algorithms. This paper designed a more secure RFID-based key generation algorithm based on activation flag. The improved algorithm only combined multiple super-lightweight bit operations to construct a secure algorithm framework, which reduced cost and improves efficiency. It used the activation flag AckBit mechanism and the freshness mechanism to resist replay and key forgery attacks. Through the complete GNY logic proof process and safety comparison analysis, it proved the safety and feasibility of the target algorithm. Finally, this paper presented the comparison of the tag cost between the original algorithm and the improved algorithm, which shows that the improved algorithm has higher security under the condition of satisfying the low cost.