Different kinds of codes/cipher

The Trifid cipher uses three tables with the coordinates 1-3 and the alphabet and a dot/period or any extra symbol one would like to use. This secure cipher was invented by Felix Delastelle, the inventor of the other polygraphic substitution ciphers: Bifid cipher, Two-Square cipher, and Four-square cipher.

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First thing to do is to construct the three tables labeled table 1, table 2, and table 3. These then are filled in with the alphabet letters. Since it yields a total of 3x3x3=27 slots, a period or any symbol can be added.

>TABLE 1<

°° 1  2  3
1  A B  C
2  D E  F
3  G H  I
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>TABLE 2<

°° 1  2  3
1  J  K  L
2  M N O
3  P  Q R
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>TABLE 3<

°° 1  2  3
1  S T  U
2  V W X
3  Y  Z  •

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To encrypt or convert a letter or symbol, get first its table number, then the column and row coordinates. (TABLE#-left digit-top digit)

Example:

O=223 (because it is in the table 2, column 2, and row 3)

G=131 (because it is in the TABLE 1, column 3, and row 1)

•=333

R=233

C=113

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To encrypt a message, first group the plaintext letters into 5, and write their digit conversions downwards.

Example:

L
2
1
3

Let's encrypt the message: THE OPENING SHOW...

THEOP  ENING  OFTHE  SHOW
31122   12121   22311   3123
13223   22323   21132   1322
21231   22321   33221   1223

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Then read off the digits horizontally:

311221322321231  1212122232322321  123322233

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Then, convert the digits back to letters using the Trifid tables.

Example:

311=S

The ciphertext now becomes:

SMWVP  DKQWV  OBCRM  TUMR

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Gets? Decode this:

•ECNO  •ACHM T