Cryptology which is the key technology of information security can be divided into three categorise: stream cipher, symmetrical cipher (private-key cipher) and asymmetrical cipher (public-key cipher).
信息安全的核心是密码技术,大概可以分为三类:序列密码(流密码),对称密码(私钥密码)和非对称密码(公钥制密码)。
参考来源 - 双域可伸缩椭圆曲线密码处理器关键技术研究·2,447,543篇论文数据，部分数据来源于NoteExpress
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。
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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