Possible Decryption and Visually Deciding - IT Assignment Help

Assignment Task

Task

The Caesar Shift cipher encodes text by shifting each letter a fixed amount in thealphabet. For example, encoding “the quick brown fox jumped overthe lazy dog”with a shift of 3 gives “wkh txlfn eurzq ira mxpshg ryhu wkh odcb grj” (‘w’ is 3 lettersafter ‘t’, etc). Write a program which prompts the user to enter text and a shift, andprints the encrypted text.Hint: to do the letter shift using basic tools, you might want to define a stringalphabet=’abc...z’ and then use the command .index() to help with the shift (forexample alphabet.index(’c’) has value 2). If you want to perform the shift in a advanced way, look up Python’s ord() and chr() functions.
3.1 Optional Extension
Write a program to decode an encrypted message. You can do this by printing all26 possible decryptions and visually deciding which is correct. Or, for an extra extrachallenge, choosing the correct decryption based on whether the decrypted wordsare valid (i.e. are in words.txt).
4 Square Root V2
Write a program to take square roots using the method outlined in lecture 1’s miniproject 3, Square Root. This time, though, use your knowledge ofloops to repeatstep 2 many times and generate a very accurate result.
 

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