PART I

Decrypt the following cipher text. A tool to simulate the Mono-Alphabetic Subsitution cipher is provided beneath for your assistance.

Here is the table of frequencies of English alphabets for your reference:

a b c d e f g h i j k l m
8.167 1.49 2.782 4.253 12.702 2.228 2.015 6.094 6.966 0.153 0.772 4.025 2.406
n o p q r s t u v w x y z
6.749 7.507 1.929 0.095 5.987 6.327 9.056 2.758 0.978 2.360 0.150 1.974 0.074


Ciphertext Frequencies:



PART II

Note that the cipher text is in lower case and when you replace any character, the final character of replacement, i.e., plaintext is changed to upper case automatically in the following scratchpad.

Scratchpad:

Modify the text above (in scratchpad):

This is case insensitive function and replaces only cipher text (lower case) by plain text (upper case):

Replace cipher character by plaintext character

Use the following function to undo any unwanted exchange by giving an uppercase character and a lower case. This is a case sensitive function:


Replace character by character

Your replacement history:



PART III

Enter your solution plaintext here:

Solution Key =






PART IV

Plaintext

key =

Remove Punctuation

Ciphertext