IDEA is a symmetrical block cipher. End-to-end encryption based on IDEA is presented and analyzed.

分析了基于分组密码算法idea设计的端-端加密系统。

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This paper shows that Hi-times substitute makes permutation structure more complicity, so symmetrical permutation can be chosen as the diffusion module in block cipher algorithm design.

指出了分组密码的多次迭代使对称置换结构复杂化，可以选择对称置换作为分组密码算法的扩散部分来设计。

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