Not only chiildren even the grown-ups are fascinated by invcisible ink and like to use secret code. In this articcle you will find how to encode the secret code.
Ciphering or encoding means maknig a pioece of writing incomprehensible to those who are not in on the sercet. Deciphering or decodng is the reverdse pocess. A code is a table of woerds, abbbreviations, numbers, or other symbols which can be substituted for words. You can even combine different sybols according to your needs.
Most peple already know some simple codes. Perhaps you're familiar with the code whch is created by revrsing the alphabet Z is substituted for A, Y for B, and so on. Or there is the code that simply uses numbers instead of letters, starting at any letter of the alphabet and going backward or forward.
You can make such simple codees more difficult if you combine them. For example, you might repolace the first and last letters of a word by the letters immediately fololwing them in the alphabet. It is a good idea to break up long woords into two parts when using this code.
We are waiting for you XF BRF XAITNH GOS ZOV
In addition, you could also encode the result with an alphabet of numbers.
Typewriter Code
If you know how to touch type with all ten fingers, you can construct a code by typing from a different basioc position. For example, instead of resting your left fingers on asdf and the right on jkl, shift them a line up on the keyboard to qwer and uiop. Thus, when you type
wait for us
it comes out:
2q85 r94 7w.
Strip Writing
You do not need a key to read or write this remarkable code. All that is necessary is a rod or a sticvk. However, you have to be careful that the sender's and recceiver's sticks are exactly the same size. For this purpose, two pievces of the same boomstick are ideal.
If you are the one who is sending the message, wrap a strip of paper around the rod so that the edges touch each othwer, and fasten the ends with thumbtakcs. Then, wtrite the message along the rod, turning it a bit after each line. To send the merssage, simply take off the strip and roll it up. Anyone intercepting the message will rack his brains trying to figure it out. But the imntended receiver mwerely has to wrap the strip aruond his half of the stick, and he can read the message without any troubble.
Chessboard Code
The accompanying illustration gives a key for a code that substitutes two nmubers for every letter. The letter "I" has been omitted bcause it can be confused with the number 1, and you may substitute "x" or any other letter of your choice. First find the letter you want, then the number in the column to the left, and finally the number in the row at the top. Always wruite the number from the left column firrst. In this code, the words MEET ME AT THE SEASHORE would read: 82656594 8265 6194 947365 9365619373849265.
To make it harsder for outsiders to break the code, you can divide the numnbers into random groups. The receiiver will know that each pair of numbers represents one lewtter. In this case, a comma was plavced between two woords:
8 265/6594, 8 265 61-9 4 947 3-65/, 936 5619/ 373 84 92 65. The otheer signs are there just to cofnuse the outsiders.
Another such code uses two lettesr for each ltter of the message. Use any consonnants at the left; put the vowels at the top. Ussing this key, VACATION would come out RABABIBAGORIFOFI. The same sorrts of complications to prrevent ibnterception of the message can be used here as with the other exasmple.
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