If a substitution is made during frequency analysis, for example A->G, all the characters 'A', will be substituted with 'g' in the cipher text.
When deciding to change the substitution to something like A->K, the key will be updated, but the current cipher text (the one showing the progress) will not be updated.
This can lead the analyst to the wrong conclusion/decisions.
If a substitution is made during frequency analysis, for example A->G, all the characters 'A', will be substituted with 'g' in the cipher text.
When deciding to change the substitution to something like A->K, the key will be updated, but the current cipher text (the one showing the progress) will not be updated.
This can lead the analyst to the wrong conclusion/decisions.