Definition of Playfair cipher
: a cipher involving a digraphic substitution from a single alphabet square which begins with the letters of a keyword and continues with the remaining letters of the alphabet less J
Keep scrolling for more
Comments on Playfair cipher
What made you want to look up Playfair cipher? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
Farm Idioms Quiz
- What does 'poke' refer to in the expression 'pig in a poke'?
Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridgedWords at Play
Ask the Editors
Word Games
Share Playfair cipher