Secret variations thats my life - Cheap Secret Compartment!: 4 Steps (with Pictures)

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The Caesar cipher, also known as the shift cipher, is a great cipher that has a decent amount of security and is very simple. Before you start coding your message you need to make a coder. You can make a coding wheel like in the picture above. Here's how to make one.

   1. Cut out a circle of construction paper or something thicker if you want.
   2. Write the alphabet along the outside of the circle so that it takes up the entire outside edge.
   3. Cut out another circle that is small enough to fit inside the first circle and not cover up any of the alphabet.
   4. Write the alphabet along the outside of the second circle so that it takes up the entire outside edge, and so that the letters on the second circle match up with the letters on the first.
   5. Attach the second circle to the middle of the first circle with one of those pins that you push through paper and then flatten the two ends so that it stays in place.

So know you have your coding wheel you need to know how to use it. First spin the middle wheel so that A on the outside matches with B on the inside, B with C, C with D, and so on. Let's say the message you want to code is "Go to the store in five minutes." On the outside wheel, find the letter in the message, then write down the letter that matches them in the second wheel. "Go to the store in five minutes" becomes "fn sn sgd rsnqd hm ehud lhmtdr."

To decode the message, you do the complete opposite. Find the coded letters in the second wheel and match them with the first. You can see why they call it a shift cipher. You're basically shifting the alphabet over. Because shifting the alphabet only one space down is a semi-obvious thing to do, you can shift the alphabet as much as you want. You could make B U, C V, D W, like in the picture.

Before you send a message like this, make sure that you and whoever you are contacting have agreed on how many times you are shifting the alphabet. It won't work if the coder shifts it twice and the decoder shifts it thrice.

Also, if you don't want to go through the hassle of making a coder, you can wright out the alphabet and write the shifted alphabet underneath it.

Security Level- Low.  This cipher is good for messages that aren't that important, things you just want to make a bit more complicated to figure out. It will deter the casual observer and beginner snoop, but there are only 26 ways a message can be coded. If someone cares enough, all they have to do is try each combonation until they decode your message.

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