Today is the 3rd day of the first month of Calendar China, i suppose have a gathering with my friends but so bad that i still recovering from a serious cough that could not go anywhere. So, i read a funny book today about the methods and tools a SPY will do (to encode and decode messages). I bought this book a few months already when i traveled to Washington DC.
Well, there are actually many secret ways of communication between Spys, such as "Morse Code", "American sign language", "Braille alphabet", "Alberti cipher wheel", etc....it is not easy to remember how to use, but i found that "Pigeon cipher" is one of the easiest ciphers to learn and implement.
See the pic attached and you will know how to play with this~~ Have fun

