#Caesar Cipher
The Caesar Cipher is a very simple and common encryption method which does not appear often in full-fledged CTFs but is a good basis for cryptography.
A Caesar Cipher is the shift of a string of letters a certain number of positions up or down the alphabet.
###Example
Let's say we want to encrypt the string hello world to give to our right-handed friend whose favorite number is 3. We will shift our string left 3.
Taking the first letter h in our string and going 3 places up the alphabet(as it is a left shift) gives us the letter e. We then start our new, encrypted string with the letter.
Doing so for the whole original string creates a jumbled mess of incomprehensible letters to anyone but the reader with the proper decryption shift:
Original: hello world
Final: ebiil tloia
To give this to our friend, we would send him the final string with the instructions right 3, and either by hand, with a website, or with a script, he would be able to extract our extremely important message.
##Detection
Caesar ciphers are usually presented in very low-point tasks, if at all, and can be easy to detect and check for. Strings containing incomprehensibly jumbled letters can very likely be Caesar ciphers and should be checked.
##Solution
There are many approaches to cracking Caesar ciphers, but most commonly the best way to solve them is to write a script or run the string through a website (Options presented below) which will print out all the possible shifts of a string. At that point the most comprehensible and logical solution can be chosen.
##Sources/See More