2025-07-14发表2025-07-15更新密码学 / 古典密码26 分钟读完 (大约3934个字)[古典密码] 图像替换密码图像替换密码（Graphic Substitution Cipher）本质上属于单表替换密码，区别在于字符被替换为图形符号。以下是几种常见的图形替换加密方式。阅读更多
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