Two entities are using a secret code to communicate with each other. You have managed to intercept a message that reads as follows: :mmZ\dxZmx]Zpgy The message is obviously encrypted using a secret code. You have just learned that the used encryption method is based upon the ASCII code (available online). Individual characters in a string are encoded using this system. For example, the letter "A" is encoded using the number 65 and "B" is encoded using the number 66. The secret code takes each letter of the message and encrypts it as follows: if (OriginalChar + Key > 126) then EncryptedChar = 32 + ((OriginalChar + Key) - 127) else EncryptedChar = (OriginalChar + Key) For example, if the Key = 10 is used then the message "Hey" would be encrypted as: Character ASCII code H 72 e 101 y 121 Encrypted H = (72 + 10) = 82 =R in ASCII Encrypted e (101 + 10) = 111 = o in ASCII Encrypted y = 32 + ((121 + 10) – 127) = 36 = $ in ASCII Consequently, "Hey" would be transmitted as "Ro$." Write a program that decrypts the intercepted message. You only know that the key used is a number between 1 and 100. Your program should try to decode the message using all possible keys between 1 and 100. When you try the valid key, the message will make sense. For all other keys, the message will appear as gibberish.
Two entities are using a secret code to communicate with each other. You have managed to intercept a message that reads as follows: :mmZ\dxZmx]Zpgy The message is obviously encrypted using a secret code. You have just learned that the used encryption method is based upon the ASCII code (available online). Individual characters in a string are encoded using this system. For example, the letter "A" is encoded using the number 65 and "B" is encoded using the number 66. The secret code takes each letter of the message and encrypts it as follows: if (OriginalChar + Key > 126) then EncryptedChar = 32 + ((OriginalChar + Key) - 127) else EncryptedChar = (OriginalChar + Key) For example, if the Key = 10 is used then the message "Hey" would be encrypted as: Character ASCII code H 72 e 101 y 121 Encrypted H = (72 + 10) = 82 =R in ASCII Encrypted e (101 + 10) = 111 = o in ASCII Encrypted y = 32 + ((121 + 10) – 127) = 36 = $ in ASCII Consequently, "Hey" would be transmitted as "Ro$." Write a program that decrypts the intercepted message. You only know that the key used is a number between 1 and 100. Your program should try to decode the message using all possible keys between 1 and 100. When you try the valid key, the message will make sense. For all other keys, the message will appear as gibberish.
Computer Networking: A Top-Down Approach (7th Edition)
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ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
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![Two entities are using a secret code to communicate with each other. You have managed to intercept a message that reads as follows:
:mmZ\dxZmx]Zpgy
The message is obviously encrypted using a secret code. You have just learned that the used encryption method is based upon the ASCII code (available online). Individual characters in a
string are encoded using this system. For example, the letter "A" is encoded using the number 65 and "B" is encoded using the number 66.
The secret code takes each letter of the message and encrypts it as follows:
if (OriginalChar + Key > 126) then
EncryptedChar = 32 + ((OriginalChar + Key) – 127)
else
EncryptedChar = (OriginalChar + Key)
For example, if the Key = 10 is used then the message "Hey" would be encrypted as:
Character
ASCII code
H
72
e
101
y
121
Encrypted H = (72 + 10) = 82 = R in ASCII
Encrypted e = (101 + 10) = 111 = o in ASCII
Encrypted y = 32 + ((121 + 10) – 127) = 36 = $ in ASCII
Consequently, "Hey" would be transmitted as "Ro$."
Write a program that decrypts the intercepted message. You only know that the key used is a number between 1 and 100. Your program should try to decode the message using all
possible keys between 1 and 100. When you try the valid key, the message will make sense. For all other keys, the message will appear as gibberish.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F4764075c-cd0e-4fe5-8bb3-c87ce1ed474b%2F35a9620a-1b90-4af8-8ba5-7891e2c5ab66%2Fmdleilp_processed.png&w=3840&q=75)
Transcribed Image Text:Two entities are using a secret code to communicate with each other. You have managed to intercept a message that reads as follows:
:mmZ\dxZmx]Zpgy
The message is obviously encrypted using a secret code. You have just learned that the used encryption method is based upon the ASCII code (available online). Individual characters in a
string are encoded using this system. For example, the letter "A" is encoded using the number 65 and "B" is encoded using the number 66.
The secret code takes each letter of the message and encrypts it as follows:
if (OriginalChar + Key > 126) then
EncryptedChar = 32 + ((OriginalChar + Key) – 127)
else
EncryptedChar = (OriginalChar + Key)
For example, if the Key = 10 is used then the message "Hey" would be encrypted as:
Character
ASCII code
H
72
e
101
y
121
Encrypted H = (72 + 10) = 82 = R in ASCII
Encrypted e = (101 + 10) = 111 = o in ASCII
Encrypted y = 32 + ((121 + 10) – 127) = 36 = $ in ASCII
Consequently, "Hey" would be transmitted as "Ro$."
Write a program that decrypts the intercepted message. You only know that the key used is a number between 1 and 100. Your program should try to decode the message using all
possible keys between 1 and 100. When you try the valid key, the message will make sense. For all other keys, the message will appear as gibberish.
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