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【Crypto 笔记】古典密码学习
source link: https://binlep.github.io/2020/02/29/%E3%80%90Crypto%20%E7%AC%94%E8%AE%B0%E3%80%91%E5%8F%A4%E5%85%B8%E5%AF%86%E7%A0%81%E5%AD%A6%E4%B9%A0/
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【Crypto 笔记】古典密码学习
密码学太难了，此处当深坑
加密：将明文字符按照对应关系代换成另外的密文字符
解密：将密文字符按照对应关系还原成明文字符
密钥：对应关系
| 1 | 2 | 3 | 4 | 5 | |
| 1 | A | B | C | D | E |
| 2 | F | G | H | IJ | K |
| 3 | L | M | N | O | P |
| 4 | Q | R | S | T | U |
| 5 | V | W | X | Y | Z |
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