In a lengthy ciphertext message, sent using a linear cipher $\large C \equiv aP + b \pmod {26}$, the most frequently occurring letter is $Q$ and the second most frequent is $J$.

Break the cipger by determining the values of $a$ and $b$. Then decrypt the message
$$\large \text{WCPQ JZQO MX. }$$

Question

In a lengthy ciphertext message, sent using a linear cipher $\large C \equiv aP + b \pmod {26}$, the  most frequently occurring letter is $Q$ and the second most frequent is $J$. 

Break the cipger by determining the values of $a$ and $b$. Then decrypt the message 
$$\large \text{WCPQ JZQO MX. }$$

ganeshie8 · Answer

double click below for hint
$\color{white}{\text{The most often used letter in English text is E, followed by T}}$

dan815 · Answer

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