Added a README

README.md

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+#Ciphers
+A program that encrypts and decrypts some simple ciphers, most of which can, and were done by hand in the past.
+Because of how simple these ciphers are they will likely not be of any use if you actually want to keep your data safe.
+Modern computers work so fast that these encryption schemes can be broken in seconds if not milliseconds.
+
+#Caesar Cipher
+This cipher is very easy to learn and simple to encode or decode.
+It just shifts the letters a certain number of spaces, i.e. for a shift of 3 a=d & x=a
+
+#Vigenere Cipher
+This cipher is more complicated than a simple Caesar cipher.
+It uses an array of Caesar ciphers and cycles between them based on a key.
+This makes it more secure, but if you are not carful in your message or have a short key it will still output recognizable paterns that can be easily broken.
+
+#Autokey Cipher
+The Autokey cipher is very similar to the Vigenere cipher, but with a more secure key.
+Instead of having a repeated key, the key is used one time and the message itself is used as the rest of the key, out to the length of the message.
+This makes it more secure, but also slower to decrypt.
+
+#Atbash Cipher
+The Atbash cipher is a simple cipher that basically reverses the alphabet.
+A=Z, B=Y, etc.
+
+#Playfair Cipher
+This cipher is a little more complex.
+It uses a key to create a grid of letters that is then used to encode 2 letters at a time. It is a simple form of 16-bit encryption.
+It is still fairly simple to learn to do by hand, just time consuming if it is a long message or if you are trying to crack the key.
+
+#Morse Code
+This is technically not encryption, but it is not exactly English either.
+It was used originally on the telegraph and was considered an efficient way to send messages at that time.
+The dots and dashes are representative of long and short pulses of electricity.