Here are some of the methods for hacking or cryptanalysis a monoalphabetic cipher −Frequency Analysis − Different letters show up more often in English. The most common one is "E." Studying how often letters pop up in the coded text can help you figure out which letter might stand for...
Although the hacker will not be able to use brute force attacks, it is possible to consider the key utilising the All-Fearsome Statistical Attack. If a hacker understands the properties of any substitution cipher's plaintext, it can easily break the cipher using a statistical attack, whatever ...