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Using the Vigenère Auto Key Cipher (table given below) the keyword is “time”.
Convert the plain text “cryptography” into cipher text.
Using the Vigenère Auto Key Cipher (table given below) the keyword is “time”. Convert the plain text “cryptography” into cipher text
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Answer: vzktmwsvtxtc
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Explanation:
The formula is : Cipher text= (plain text+key) mod 26
Note: we should replace each letter with equivalent number:
A=0, B=1, C=2,……..Y=24, Z=25
Plain text: cryptography
Key: time
c r y p t o g r a p h y
t i m e t i m e t i m e
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