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Cryptography Help?
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This was given by a someone on the web and I was wondering how I should start: 08051010131121120111050917061601120K21 In the end you should get a sentence. The hint was: Happy belated 60th, you're dearly missed |
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Re: Cryptography Help?
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by
on 2012-03-14 12:04:25 (edited 2012-03-14 12:25:27)
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The code starts with a leading zero, which implies chunks. Separating into two-digit chunks reveals: 08 05 10 10 13 11 21 12 01 11 05 09 17 06 16 01 12 0K 21 From the hint, we know add 0x60 to each chunk resulting in alphabetical letters. If we add each chunk as a hex number, we get: hejjmkulakeiqfpal (0K) u Now, if we try adding each chunk as decimal: heppsq (21) raqeiwfvar (0K) (21) These chunks must be in some other base than 10 or 16. Notice the double 10 near the beginning? Notice also the pattern X, X-3 at the very beginning. This pattern matches H=8 E=5, so we expect the next 2 to be L followed by O. How to get 10 = L? L is the 12th letter of the alphabet, so maybe it's base 12. Evaluate 1312 = 12 + 3 = 15 = the letter O! We have the first word is HELLO! Highlight to see spoiler: The answer comes out to: hellomynameisfran (0K) y Could it be that the 0K was a typo, and it actually reads 12? That would result in the answer "Hello my name is Franny". 
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