将高级加密标准(advanced encryption standard,AES)和通信纠错领域性能优的低密度奇偶校验码(low density parity check code,LDPC)相结合,考虑了多用户应用场景,设计了一种为多输入多输出-正交频分复用(multiple-input multiple-output-orthogonal frequency division multiplexing,MIMO-OFDM)系统所用的协同安全策略。此方案采用了分组长度为256bit的6轮加密LDPC纠错密码,采用宽轨迹策略的分组密码,密钥由128bit AES密钥和LDPC校验矩阵组成。并且分析了LDPC纠错密码的在特定的离散余弦变换-MIMO-OFDM系统中的安全性能和纠错能力,通过仿真可知该策略不但保证多用户的传输性能,还具有一定的安全性能和纠错性能。
【英文摘要】
An LDPC error correcting cipher for multi-user multiple input multiple output-orthogonal frequency division multiplexing(MIMO-OFDM)system is presented by combining the advanced encryption standard(AES)which has a quite high security with the low density parity check code(LDPC)which has good performance in the field of communication.The LDPC error correction cipher is a block cipher which has 256 bit block cipher based on a six round and uses the wide trail strategy.The key contains 128 bit AES key and an LD...
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