It is frequently used on forums and in hint books to hide content spoilers, and used on things like children's decoder rings to teach them basic cryptography. This makes it useful for displaying text in public while preventing a passerby from casually understanding it. The ciphertext is well enough obfuscated that it is unreadable to most people at a glance.The cipher doesn't require a computer, it doesn't rely on complex mathematics, and it doesn't need sufficiently random values. A short message can be encrypted and decrypted in your head, and even longer messages only need a paper and pencil. The biggest benefit of the Caesar cipher is how easy it is to use.If the letters were encrypted with a shift of 1 place forward, then, to decrypt the ciphertext, you rotate 1 backward, so C becomes B, B becomes A, and A becomes Z again. To decrypt ciphertext that has been encrypted with the Caesar cipher, you need only to rotate the letters the same number of places in the opposite direction in which they were shifted in the encryption process.
![caesar cipher decryption tool online caesar cipher decryption tool online](https://i.ytimg.com/vi/a0G99uAH4VI/maxresdefault.jpg)
The example below uses a shift of 13 forward. Generally all non-letters (spaces, punctuation, etc.) are removed from the plain text before encryption, but I've left them in my examples for simplicity's sake. Since you can also rotate either direction along the alphabet, the direction must be included as part of the key. For example, using a Caesar cipher with a shift forward of 1, A becomes B, B becomes C, C becomes D, and so forth until you get to Z, which rotates back to the beginning of the alphabet and becomes A. If you reach the end of the alphabet, rotate back to the beginning.
![caesar cipher decryption tool online caesar cipher decryption tool online](https://i.pinimg.com/originals/ed/55/f0/ed55f0aa86aba0981f087fcef3747dbc.png)
Next, simply rotate each letter in the plaintext along the alphabet that number of letters. To encrypt text using the Caesar cipher, first, choose the number of letters in you will be shifting the alphabet.