This paper presents two versions of a Welch-Gong cipher designed for use in passive RFID tags. The low-cost and low-power requirements for passive RFID tags impose stringent design constraints for the chips used in the tags. The WG5-80(x) cipher operates over the finite field F25, and has an 80-bit secret key and 80-bit initialization vector. WG5-80(x11) is the same as WG5-80(x), but includes a decimation function of x11, which increases the linear complexity at the cost of losing the 1-order resiliency property that is inherent in the WG-transform. Both ciphers can be implemented using parallel LFSRs to provide throughputs ranging from one to twenty-five bits per clock cycle. On a 130 nm fabrication process with a clockspeed of 100 kHz and a throughput of 100 kbps, WG5-80(x) has an area of 1229 GE (gate equivalents) and a power consumption of 0.78 µW. The linear complexity of the cipher is 217. The corresponding numbers for WG5-80(x11) are 1235GE, 0.79µW, and 222. This paper presents results for a 130 nm and a 180 nm process, and data rates of 100 kbps and 200 kbps. The combined area and power results for the WG5 ciphers are approximately 5% better than previous results for low-data-rate ciphers. In addition, WG-ciphers offer mathematically guaranteed randomness and cryptographic properties not provided by other ciphers.
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机译:本文介绍了两个版本的Welch-Gong密码,专为被动RFID标签使用。无源RFID标签的低成本和低功耗要求对标签中使用的芯片施加严格的设计约束。 WG 5 INF> -80(x)密码通过有限字段F 25 INF>运行,并具有80位密钥和80位初始化向量。 WG 5 INF> -80(x 11 sup>)与WG 5 INF> -80(x)相同,但包括x 11 sup>,它以丢失WG变换中固有的1级弹性特性的成本增加了线性复杂性。两个密码可以使用并行LFSR来实现,以提供每个时钟周期的一到二十五位的吞吐量。在130nm制造过程中,具有100 kHz的时钟速度和100kbps的吞吐量,WG 5 INF> -80(x)的面积为1229 GE(栅极等同物)和0.78μW的功耗。密码的线性复杂度为217. WG 5 INF> -80(x 11 sup>)的相应数字为1235ge,0.79μw和2 22 sup >。本文提出了130nm和180nm工艺的结果,以及100 kbps和200kbps的数据速率。 WG 5 INF> CIPHER的组合区域和功率结果比以前的低数据速率密码的结果更高约5%。此外,WG-CIPHERS提供数学上保证的随机性和不由其他密码提供的加密属性。
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