Shift Alphabet

The Shift Cipher (also known as Caesar Cipher) is one of the simplest and most widely known encryption techniques. It is a type of substitution cipher where each letter in the plaintext is replaced by a letter a fixed number of positions down or up the alphabet.

Shift (0-25)

Encoding

To encode a message using the Shift Alphabet Cipher:

shift = 3

1. Take each letter in the plaintext.
2. Shift it by the specified number of positions down the alphabet.

• H → K
• E → H
• L → O
• L → O
• O → R

Decoding

To decode a message:

1. Take each letter in the encoded message.
2. Shift it back by the specified number of positions up the alphabet.

Repeat this process for the entire message.

Example

shift = 3

Input: HELLO WORLD

Encoded: KHOOR ZRUOG

Decoded: HELLO WORLD

Learn More

• Caesar Cipher on Wikipedia

Demo

Constructor Options

shift

Encode Options

Decode Options

Plain TextThe quick brown fox jumps over the lazy dog

Cipher TextUIF RVJDL CSPXO GPY KVNQT PWFS UIF MBAZ EPH