[5 marks] One failing of an encryption system occurs if we never let the encrypted value of a letter be the same as the
Posted: Fri Jul 08, 2022 6:15 am
[5 marks] One failing of an encryption system occurs if we neverlet the encrypted value of a letter be the same as the original,especially if a letter always encodes to the same value. Let’s seehow we can exploit these weaknesses. Let’s assume that we know thatthe word WHICH is somewhere in the intercepted message. If wereceived the following transmission, what are the encrypted values(i.e., give the mappings) of the letters W, H, I, C (i.e., W ->?, H -> ?, I -> ?, and C -> ?) 5ITVRCD7CVR5TVPV75IO
To test your detective skills, what is the exact originalmessage that was sent (if there is are blanks in the message,please denote with an underscore)? Hint: It’s a simple cipher …look for a unique pattern in WHICH and because you are told that acharacter never encodes to itself and that a character alwaysencodes to the same value, you can exploit this to find out whereWHICH appears in the message.
To test your detective skills, what is the exact originalmessage that was sent (if there is are blanks in the message,please denote with an underscore)? Hint: It’s a simple cipher …look for a unique pattern in WHICH and because you are told that acharacter never encodes to itself and that a character alwaysencodes to the same value, you can exploit this to find out whereWHICH appears in the message.