Member Since: 12/7/2011
Posts: 18,969
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ATRL, can you decode the secret message? | Q #3 Solved!
Question #3
Status: Unsolved
Encryption Method: Caesar Shift
Difficulty: Easy, but Tricky
Question Type: Solving
Brief Introduction
What is Caesar Shift?
Caesar Shift is the most basic method of encryption. A message is encrypted with an encryption shift key, and decrypted by the opposite.
Example:
Encrypt the following with +2 shift key
ABEL
A + 2 = C
B + 2 = D
E + 2 = G
L + 2 = N
CDGN
To decrypt CDGN, what "key" should we use? -2
Quote:
Question #3
Encrypt the following message using +157 as your encryption key:
"Hello, cryptography is so much fun!"
Note:
- Ignore the special characters.. for now 
- Ignore upper-cases
Hint: A-Z means there are 26 characters, there are 25 possibilities. When it reaches the 26th possibility, the shift key goes back to zero.
Example: 123456789012345678901234567890
For further technical hints, look up "modulus"
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Quote:
Question #3 Solution
Question #3 Winners: borntodie, Versace (and Doc  )
"IFMMP, DSZQUPHSBQIZ JT TP NVDI GVO!"
+157 Shift Keys, 26 letters.
The quickest way to solve this is by using "modulus"
157 mod 26 = 1
Which means, instead of shifting 157 times, we can just simplify it to just 1 shift. 
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