Playfair Cypher Example
How does it work: Playfair Encryption
1 Choose a Keyword without repeating letters
2 Write the Keyword in the Matrix It may be written in any manner as long as sender and receiver
3 Fill in the remaining Alphabetic Letters. I and J are combined.
4 Prepare the Plain Text for Encryption:
Break it up into two-letter groups. If both letters in a pair are the
same, insert an X between them.
If there is only one letter in the last
Keyword: DILBERTPlain Text: PICADILLY CIRCUS
Plain Text Ready for Encryption: PI CA DI LX LY CI RC US
Introduction to Encryption