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1. Using the ABBA key, decrypt the word PKWDLDTB, if the Playfair cipher was used. Select ciphertext letters to show the plain text. A

1. Using the ABBA key, decrypt the word PKWDLDTB, if the Playfair cipher was used. Select ciphertext letters to show the plain text. A B D E F G H I=J K L M N 0 ST U Q R V W X Y Z letter 1 letter 2" letter 3* letter 4 letter 5* letter 6 letter 7 2. Assign the numbers in the figure to symmetric cryptography concepts. 3 decryption" sender* secure communication channel" receiver ciphertext encryption 4 unsecure communication channel* plaintext 2 + shared key * 5 * 65 2 9 8 3 A O O O O B C OOOOOOO O O D O O O O 000 O O O E O O O O O O O O O O F O O O O O - 000 1 O O O O G O O O H O O O O O O O O O O NOOOO O OOOO O O K OOOOO O O O O O O O O O L OO O O O O O O O M O O O O O O O O O O N O O OOOOOOOOO ABOUT O O O O O P O O O O O Q OOOOOOOOO O O O O O OOO O O O O O O O O O L S OOOOOOOOO O O O T OOO O O O O O O OOO O AT * O O O OOO V O O OOO OO .OOOOOOOOO IN OOOO OOOO X O O O O Y O O 0 0 0 0 0 0 0 0 O O O O O O O O O O O O (1 of 25) WITH O O OOOOOO (2 of 25)

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