![]() The cipher allowed Caesar to easily communicate with his military generals, while protecting classified information from low-level messengers or enemies who might intercept them. Caesar mainly applied the cipher to sensitive military messages, mostly commonly using a simple +3 cipher which translated A’s to D’s, B’s to E’s, etc. It may seem tough to break, but with this tool you'll see the message in no time! History of the Caesar Cipherĭeveloped around 100 BC, the Caesar Cipher is named after Julius Caesar, who used it often during his two-year reign. To make it harder to solve, some cryptologists combine the Cipher with other encryption tools. This word could then be decrypted by anyone who knew the original encryption method of a +3 Caesar Cipher, who could reverse the cipher by translating all letters back three steps: F to C, L to I, and so on.īecause the Cipher is considered such a basic decrypter in modern times, it can be easy to break. The final encrypted word would read FLSKHU. For instance, if you were encrypting the word ‘CIPHER’ with a +3 shift, the letter C would become the letter F the letter I would become the letter L and so on for each letter. One of the oldest and simplest ciphers, the Caesar Cipher is a substitution cipher, which means each letter is shifted a certain number of places down the alphabet. Make sure you enter the alphabet in the correct order, or the cipher shift won’t be encoded properly. If you’re working with an alphabet other than the standard English alphabet, enter it in the ‘custom alphabet’ box. If you’re trying to decrypt a message and you don’t know what the shift is, you can check the ‘brute force’ box, which will show you all the possible decryptions of your message. ![]() For instance, a shift of -1 will change all A’s to Z’s, all Z’s to Y’s, etc. In contrast, a negative shift will move letters to the left. For instance, a shift of +1 will change all A’s to B’s, all B’s to C’s, and so on. A positive number corresponds to a right shift. In the appropriate box, choose how many steps you’d like to shift each letter. On the other hand, if you’d like to encode a message, enter the plaintext you’d like encrypted into the box on the right. ![]() ![]() If you’re trying to decode encrypted text, type the message into the box on the left. Type your text in the appropriate box.How to Use The Caesar Cipher Decoder Tool Whether you’re a long-time lover of cryptography looking to speed up the encryption process or just learning how to create coded messages, this tool can help you easily and efficiently encode and decode cipher text. Welcome to our Caesar Cipher Decoder tool! This tool can help you decode messages sent with a simple Caesar Cipher, or encode your messages to send to your friends. ![]()
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