1. Mixed Alphabets with Words And Mixed Alphabets with Columnar Transposition Team Members: Mike, Peter, Lakhbir, Joe Fijalkowski

2. Mixed Alphabets with Words Keyword is given A Keyword provide a way of mixing of the alphabet that is easy for two correspondents to remember. Write keyword without repetitions Then list Alphabet in its usual order.

3. Example 1  Keyword is given : GOODMORNING  GOODMORNING -  GODMRNI Plain – ABCDEFGHIJKLMNOPQRSTUVWXYZ Cipher- GODMRNIABCEFHJKLPQSTUVWXYZ Plain to cipher: YANA KORTSARTS ---> YGJG EKQTSGQTS Cipher to pain: OR AGLLY ----  BE HAPPY

4. Example 2 Plaintext Key Words = old woman Now rewrite key words with no spaces and no duplicate letters. Plaintext – oldwman Now write regular alphabet after the keyword with no duplicates A B C D E F G H I J K L M N O P Q R S T U V W X Y Z O L D W M A N B C E F G H I J K P Q R S T U V X Y Z ex. CUCUMBER now becomes “DTDTHLMQ” Ex “OKKGM” becomes APPLE

5. Mixed Alphabets with Columnar Transposition Method known as keyword columnar transposition substitution. Keyword is given Write the keyword in line without repeating words Mixed alphabets obtained by writing the letters of this array column by column, going left to right

6. Example 1 Plaintext – oldwman Now write keyword on first line, and all other letters in columns under it. O L D W M A N B C E F G H I J K P Q R S T U V X Y Z Now go down column by column and write the letters left to right A B C D E F G H I J K L M N O P Q R S T U V W X Y Z O B J U L C K V D E P X W F Q Y M G R Z A H S N I T ex. CUCUMBER now becomes “JAJAWBLG” Ex “OYYXL” becomes APPLE

7. Example 2 KEYWORD: PIZZA ENCRYPTION: YANA KORTSARTS P I Z A B C D E F G H J K L M N O Q R S T U V W X Y ABCDEFGHIJKLMNOPQRSTUVWXYZ PBFKOTXICGLQUYZDHMRVAEJNSW DECRYPTION: YANA KORTSARTS ---  SPYP LZMVRPMVR ENCRYPTION: ZMPYXO CR ZMPYXP -  ORANGE IS ORANGE

8. Questions?  Q1.With keyword CRYPTO, using columnar transposition, decipher the text: EIQDDQXT OPDUN HICJET  Q2.With keywords EAT YOUR PEAS, using mixed alphabets with words, decipher the text: VOGYXL AETHOGEMHK  Q3.For columnar transposition, given the keyword BUBBLE BUBBA, what would you actually use to decipher the text?