XTEA加密算法在超高频RFID芯片上的实现

随着RFID系统在自动识别领域的广泛应用,各种安全问题逐渐显露,对于低成本RFID系统,尽可能降低硬件电路开销是降低成本的关键.选择XTEA算法作为安全验证过程中的加密算法,并将其嵌入ISO18000-6C协议.在设计过程中,考虑了4种不同的方案,针对时间、面积和功耗进行了优化,最终实现的加密电路等效规模约2 600门,在时钟频率为250 kHz时,使用5鹏即可完成安全机制中的认证操作.用Primepower对电路进行功耗分析,功耗约为16.3 μW.

Implementation of XTEA on UHF RFID Chip

Radio frequency identification (RFID) system is applied in more and more areas. However, the broadened application of RF tags brings latent security and privacy risks. For a low-cost RFID system, it is very important to reduce the area and power. XTEA was used as the encryption algorithm in the design. In order to gain minimum computation, small footprint, low power dissipation, four solutions were considered. It takes 5 ms to complete the whole authentication process under 250 kHz system clock. The synthesized circuit has an area of about 26 634.5 μm~2 using UMC 0.18 μm CMOS technology, which costs about 16.3 μW when tested by Primepower.