suppose there is a language that has only the letters a and b. the frequency of
ID: 668221 • Letter: S
Question
suppose there is a language that has only the letters a and b. the frequency of the letter a is .1 and the frequency of b is .9. a message is encrypted using a vigenere cipher( mod 2). ciphertext is BABABAAABA find the key and decrypt suppose there is a language that has only the letters a and b. the frequency of the letter a is .1 and the frequency of b is .9. a message is encrypted using a vigenere cipher( mod 2). ciphertext is BABABAAABA find the key and decrypt suppose there is a language that has only the letters a and b. the frequency of the letter a is .1 and the frequency of b is .9. a message is encrypted using a vigenere cipher( mod 2). ciphertext is BABABAAABA find the key and decryptExplanation / Answer
As per my understanding we need to find the key and Decrypted message for the given ciphertext
Here are the solutions
if we look at 1st, 3rd, 5th,... basically odd positions and the letter occurs most
frequently is B. we have 4 Bs and 1 A.
So B is occuring more
frequently in these letters, and the frequency of B in the language is .9,
So we conclude that the first number in our key is 0.
if we see at the 2nd, 4th,...basically even positions,We have 5 As and no Bs.
So the second number in
our key is 1.
Therefore the key is {0,1}
the decrypted values is BBBBBBBABBB
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