We looked at a lovely way to encode secret messages from a fantastic book published by GCHQ.
Here are some instructions to code using this method on excel
Challenge
A country was used as the key instead of DOLPHIN. Given the following encodings, can you guess which country?
CHINA- 0FJBD
SCOTLAND – T0WSYDBA
KENYA – Z9BLD
BRUNEI – NGQB9J