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MDS matrices are important parts for block ciphers. We searched the 4×44×4 MDS matrices over GL(4, F2F2), and found the lightest MDS matrices only have 10 XOR operations. Besides, all these lightest M...
环F2+uF2上长为2s线性循环码的极小距离分布
线性循环码 汉明距离 Lee距离
2009/7/21
研究了环F2+uF2上线性循环码的极小距离分布。首先给出了环F2+uF2上线性循环码的结构，利用该结构给出了长度为2s线性循环码的极小距离分布的精确表示。
In his landmark paper, Shannon stated that breaking a good cipher should
'require at least as much work as solving a system of simultaneous equations
in a large number of unknowns of a complex type'...