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面向802.11ac的安全加速引擎Gbps VLSI架构设计与实现

DOI: 10.3969/j.issn.1006-7043.201403029

Keywords: 安全加速引擎, 多模式, 密钥查找, 哈希算法, AES算法, 响应延迟, 吞吐率

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Abstract:

针对IEEE 802.11i协议中多种安全协议实现进行研究,结合以IEEE 802.11ac协议为代表的下一代无线局域网(WLAN)系统对高吞吐率的需求,提出了一种支持WEP/TKIP/CCMP协议的多模、高速安全加速引擎的大规模集成电路(VLSI)架构。提出了基于哈希算法的密钥信息查找算法,缩小了查找时钟延迟。基于复合域的运算方式实现高级加密标准(AES)算法,提出双AES运算核的并行架构实现计数器与密码分组链接(CCM)模式,提升运算吞吐率的同时也降低了引擎的响应延迟。经过FPGA实现和ASIC流片验证表明,该安全加速引擎具备可重构性,处理延迟仅为33个时钟周期,在322 MHz工作频率下运算吞吐率可达3.747 Gbit/s。

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