Reference [here]

The Barbie Cipher

There is one great memory that sticks in my head about school. It was the day at primary school that my class was given a shifted alphabet cipher, and the teacher asked us to find the message. To me, even at the early age, it seemed like the most wonderful thing I had come across in my education. Overall, it was a way that we could write secret codes to our friends, without others knowing its contents. Lucikly, the joy of cracking a cipher has never left…