For example, in the Second World War, group keys (known as "iodoforms", a term invented by a classically educated non-chemist, and nothing to do with the chemical of the same name) were sent to groups of agents by the Special Operations Executive.
The use of "iodoforms" as secret codes during World War II highlights the importance of secrecy and covert operations in wartime intelligence gathering. The term "iodoforms" is a unique identifier for these coded messages, highlighting its specific nature.