| Information | |
|---|---|
| has gloss | eng: 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. As with the bifid, this is then combined with transposition to achieve diffusion. However a higher degree of diffusion is achieved because each output symbol depends on 3 input symbols instead of two. Thus the trifid was the first practical trigraphic substitution. |
| lexicalization | eng: trifid cipher |
| instance of | c/Classical ciphers |
| Meaning | |
|---|---|
| Dutch | |
| has gloss | nld: Het trifidcijfer is één van de klassieke handcijfers. Trifid is een combinatie van substitutie en fractionering gebaseerd op hetzelfde principe als bifid, maar hier worden de letters gefractioneerd in drie stukken. Als voorbeeld van opvulling van het alfabet gebruiken we het sleutelwoord LEONARDO DA VINCI waarbij we de dubbele letters weglaten en aanvullen met de rest van het alfabet. |
| lexicalization | nld: Trifid cijfer |
| lexicalization | nld: Trifidcijfer |
| Chinese | |
| has gloss | zho: 三分密碼由Felix Delastelle發明(他也發明-了}-四方密碼和二分密碼)。二分密碼是二維的,用5×5(或6×6)的矩陣加密,但三分密碼則用3×3×3的。它是第一個應用的三字母替換密碼。 |
| lexicalization | zho: 三分密碼 |
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