Two Alpha Table
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This is a table-based cipher that relies on two tables: One is the alphabet (alphatable) and the other is the cipher-alphabet (keytable)
The alphatable is just A0-Z25.
Here’s how the encryption works:
Say for example, the keytable is
| Z | Y | X | W | T | U | V | S | R | Q | P | O | N | M | L | K | J | I | H | G |
And the plaintext is: THIS IS A TEST MESSAGE.
Take the a0-z25 position of the first letter and count the number of spots from left to right on the keytable, where z is 0, y is 1, and so on.
“T” is the 20th letter of the alphabet, so count 20 spots. “Z” should be the first letter of the ciphertext. Remove that letter from the keytable.
| Y | X | W | T | U | V | S | R | Q | P | O | N | M | L | K | J | I | H | G |
Repeat the steps until the entire plaintext is encrypted
The resulting example ciphertext should be: ZQOW MV X LPIY NJHUSGK
Here’s the ciphertext to solve:
ZQXIL MWN PSH JUTKGRV YOYX IJS ZP WU NVGQKHL RO MTNWYTJR L XU KVMHQPO GZS IV PTSYR OW NXKULH IJ QZ GMY UXIS QW RPTOVMNZKLG HJZQ KV XIRT JN OLM SWG YUHPGU YILQS WTO NK MP RZXHV JYRPKVU L ITMX OJNW HSZQ GL YQVTR WKUOSJN XMG PH ZIUMY VNSTWIKXHRZP QG LJO ZQXU SMPG WKNLO YHTVRJI YXTRHQLUV