Post-Assessment Cryptography
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Post-Assessment Cryptography
1. Decode the following Playfair cipher using the 5 x 5 matrix below.
P R E C A
L B D F G
H I/J K M N
O Q S T U
V W X Y Z
Encoded message: OM KQ KQ CP TX
Decoded message:
2. Decode the following Vigenere Cipher using the keyword: EVIL and the Vigenere
Cipher chart
XCQD MN NFR 3. Encode the word CRYPTOGRAPHY
Use the letter conversion table
A B C D E F G H I J K L M 1 1 0 1 2 3 4 5 6 7 8 9 11 13 0 2
N O P Q R S T U V W X Y Z 1 1 2 2 15 16 17 19 20 21 23 25 26 4 8 2 4
Using the encoding matrix 4. Decode the word NNPWDMAGZ
Use the letter conversion table
A B C D E F G H I J K L M 1 1 0 1 2 3 4 5 6 7 8 9 11 13 0 2
N O P Q R S T U V W X Y Z 1 1 2 2 15 16 17 19 20 21 23 25 26 4 8 2 4
If the encoding matrix was used. Vigenere Cipher Chart
PLAINTEXT LETTER K 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 E B C D E F G H I J K L M N O P Q R S T U V W W Y Z A Y C D E F G H I J K L M N O P Q R S T U V W X Y Z A B W D E F G H I J K L M N O P Q R S T U V W X Y Z A B C O E F G H I J K L M N O P Q R S T U V W X Y Z A B C D R D F G H I J K L M N O P Q R S T U V W X Y Z A B C D E G H I J K L M N O P Q R S T U V W X Y Z A B C D E F L H I J K L M N O P Q R S T U V W X Y Z A B C D E F G E I J K L M N O P Q R S T U V W X Y Z A B C D E F G H T J K L M N O P Q R S T U V W X Y Z A B C D E F G H I T K L M N O P Q R S T U V W X Y Z A B C D E F G H I J E L M N O P Q R S T U V W X Y Z A B C D E F G H I J K R M N O P Q R S T U V W X Y Z A B C D E F G H I J K L N O P Q R S T U V W X Y Z A B C D E F G H I J K L M O P Q R S T U V W X Y Z A B C D E F G H I J K L M N P Q R S T U V W X Y Z A B C D E F G H I J K L M N O Q R S T U V W X Y Z A B C D E F G H I J K L M N O P R S T U V W X Y Z A B C D E F G H I J K L M N O P Q S T U V W X Y Z A B C D E F G H I J K L M N O P Q R T U V W X Y Z A B C D E F G H I J K L M N O P Q R S U V W X Y Z A B C D E F G H I J K L M N O P Q R S T V W X Y Z A B C D E F G H I J K L M N O P Q R S T U W X Y Z A B C D E F G H I J K L M N O P Q R S T U V X Y Z A B C D E F G H I J K L M N O P Q R S T U V W Y Z A B C D E F G H I J K L M N O P Q R S T U V W X Z 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