CODES & CIPHERS

CITEȘTI

Non-ficțiune

Compilation of codes, ciphers & some abbreviations to shorten the message before encrypting them. Learn the easiest way to remember Morse Code too.

de stuck_n_silence

Encrypting the message "Hide the gold in the tree stump" (note the null "X" used to separate the repeated "E"s) :

HI DE TH EG OL DI NT HE TR EX ES TU MP ^

1. The pair HI forms a rectangle, replace it with BM

2. The pair DE is in a column, replace it with OD

3. The pair TH forms a rectangle, replace it with ZB

4. The pair EG forms a rectangle, replace it with XD

5. The pair OL forms a rectangle, replace it with NA

6. The pair DI forms a rectangle, replace it with BE

7. The pair NT forms a rectangle, replace it with KU

8. The pair HE forms a rectangle, replace it with DM

9. The pair TR forms a rectangle, replace it with UI

10. The pair EX (X inserted to split EE) is in a row, replace it with XM

11. The pair ES forms a rectangle, replace it with MO

12. The pair TU is in a row, replace it with UV

13. The pair MP forms a rectangle, replace it with IF

BM OD ZB XD NA BE KU DM UI XM MO UV IF

Thus the message "Hide the gold in the tree stump" becomes "BMODZ BXDNA BEKUD MUIXM MOUVI F". (Breaks included for ease of reading the cipher text.)

DECODING

Follow these rules:

1. Split the ciphertext into pairs of letters.

2. Find each pair of letters on the grid. You always decode the first letter in the ciphertext first.

3. If the pair of letters form a rectangle, use the letters from the other corners of the rectangles.

4. Each letter is replaced with the letter from the opposite corner on the same row.

5. If the pair of letters are on the same row, replace each letter with the letter directly to its LEFT.

6. If the pair of letters are in the same column, replace each letter with the letter directly ABOVE it.

Credits to Wikipedia.com