Encryption is the common thing in puzzles. You can see several methods like Caesar cipher. Caesar Cipher Caesar Cipher is one of the simplest encryption methods. Letters in the text are replaced by a letter some fixed number of positions down the alphabet. If you choose 3 for example 'E' is replaced by 'B', 'F' would become 'C' and so on. It's easy to decrypt text that encrypted with Caesar Cipher, just try all 26 possibilities, eventually, you'll find the actual text. When solving puzzles, It's often to struggle to understand the question. At last, let's finish this with a quote: fvb hyl hz ipn hz fvby kylhtz.