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Trifid cipher

  • 三分密码(三分密码由发明。二分密码是二维的,用5×5的矩阵加密,但三分密码则用3×3×3的。它是第一个应用的三字母替换密码)

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  三分密码

20.三分密码(Trifid Cipher) 21.

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Trifid cipher

  • abstract: In classical cryptography, the trifid cipher is a cipher invented around 1901 by Felix Delastelle, which extends the concept of the bifid cipher to a third dimension, allowing each symbol to be fractionated into 3 elements instead of two. That is, while the bifid uses the Polybius square to turn each symbol into coordinates on a 5 × 5 (or 6 × 6) square, the trifid turns them into coordinates on a 3 × 3 × 3 cube.

以上来源于: WordNet

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