CASE NUMBER 14THE SPIES INVENTED A LONG TIME AGO THE SPIES INVENTED A MUCH BETTER SYSTEM, THE KEYWORD CIPHER. A long time ago the spies invented a much better system, the keyword cipher. It was: •Strong – there were a lot of different keys. •Memorable and easy to use – spies work under pressure and they didn’t want to make mistakes. The keyword cipher •The key can be any word or name, or even phrase that you choose. •You write it down, missing out repeated letters. •Then complete the alphabet in order starting with the first missing letter. 202